tech-specs · tech-specs

The home security camera market is a mixed bag. A product advertised as "4K" can actually perform worse than a "2K" competitor. This article breaks down the core technical specs to help you buy a device that truly works.

Which is better: projector bulb, LED, or laser? Why can some projectors be used during the day? Do laser projectors harm your eyes? Is LED brightness sufficient? What's the difference between ultra-short throw and long t

Is a GPU temperature of 80°C normal? Why won't your graphics card hit its rated boost clock? How do you remove power limits and temperature limits? How much difference does water cooling make vs. air cooling? This guide

Got WiFi dead zones at home? Can't decide between Mesh and AP panels? Getting only a few hundred Mbps on a gigabit connection? Are WiFi 6 and WiFi 7 really that different? This guide breaks down home networking from the

Is your robot vacuum still a "dumb robot"? Why can some avoid socks while others bump into shoes? What's the real difference between LiDAR, vision navigation, and dToF? This article breaks it down from the sensor princip

Still just looking at lumens when buying a projector? Can't decide between a bulb, LED, or laser model? What's the difference between triple-color laser and single-color laser? Why are some projectors unwatchable during

Buying a monitor based only on resolution? How much color gamut coverage is enough? What's the real difference between 8-bit and 10-bit? Is ΔE<2 truly professional-grade? This guide breaks down color science from the gro

What do all those health metrics on your watch actually mean? Is a low heart rate variability a sign of illness? What’s a normal blood oxygen level? How accurate is sleep tracking? This guide explains health data from a

Bluetooth headphones sound bad for music? High latency for gaming? Which is better, aptX or LDAC? Why do some headphones have high latency and others low? This article explains it all from the perspective of digital audi

What's the real difference between Cherry MX Red, Brown, and Blue switches? Are all linear switches the same? Does lubing actually work? Is it hard to mod switches yourself? This guide breaks down switch selection and tu

How do you inspect a used laptop? How to spot a refurbished unit? How to test battery life? How to check for screen dead pixels? This guide teaches you a comprehensive inspection method from a hardware engineering and sy

How deep is the second-hand phone market? How do you spot a refurbished phone? How can you tell if the storage has been upgraded? How do you avoid getting scammed during an in-person transaction? This guide teaches you c

Five people sharing one router in a shared apartment, and gaming lags so badly it makes you question life? WiFi signal drops to one bar after two walls? Where should you actually place the router? This guide optimizes yo

Does a microwave oven actually pose radiation hazards? Why is heating sometimes uneven? How do you choose safe containers? This article starts from the principles of electromagnetic waves to thoroughly answer your questi

Renting and experiencing poor WiFi signal, losing connection through a single wall? This article helps you build a stable, fast home network with minimal cost, and makes it easy to migrate when moving.

Robot vacuums are getting more expensive, and base stations are packing in more features. Which ones are genuine needs, and which are just a tax on the uninformed? This article helps you buy rationally.

Are home RF devices actually effective? Is spending thousands of yuan worth it? This article starts from the technical principles to help you evaluate the effectiveness of RF devices and key buying considerations.

Thinking about installing a few cameras for home security but feeling overwhelmed by the specs? This article helps you understand the core parameters of security cameras and build a practical home surveillance system.

What size tablet should you buy? How much RAM is enough? How do you read display specs? This article breaks down the core knowledge you need to choose a tablet without getting lost in spec sheets.

Phone fast charging is getting faster, but charging heads come in all shapes and sizes. Which combinations deliver maximum performance? This article takes you from theory to practice, helping you fully understand fast ch

Want a keyboard with smooth keystrokes and great sound, but overwhelmed by the terminology in the custom keyboard community? This article will help you understand keyboard customization from scratch and find the right en

Buying a projector often means getting lost in a sea of specs. Brightness, contrast, color coverage... This article helps you see through the essence of projector specifications and choose a machine truly suited for home

Smartwatches generate a massive amount of health data every day, but most people only look at their step count. This guide helps you truly understand your watch's health monitoring data, showing you what's useful and wha

When buying Bluetooth headphones, you're always asked "What codec does it support?" SBC, AAC, aptX, LDAC... What exactly are the differences between these codecs, and how much do they affect sound quality? This article e

Spent a fortune on a PC but getting lower game frame rates than expected? The issue might be a configuration imbalance where one component becomes a bottleneck. This guide helps you understand how to build a well-balance

Bought a NAS but only using it like a regular external hard drive? This guide will help you deeply understand RAID configuration principles, user permission management, and how to scientifically plan your NAS usage strat

Bought a new laptop six months ago, and now performance has noticeably dropped with loud fan noise? This isn't just "slowing down" — it's performance throttling caused by cooling issues. This guide explains how to mainta

Bought an expensive monitor, but the colors look yellowish or greenish? An "inaccurate" screen is a common frustration. This guide helps you understand monitor color parameters, know when calibration is needed, and how t

Phone performance is already impressive, but your photos still lack that professional feel? 90% of the difference isn't the device—it's your composition and post-processing approach. This guide will help you systematical

There are plenty of guides for inspecting used phones, but the inspection methods for used tablets and headphones are different. This guide covers the core checks you need to perform before placing an order or inspecting

Is your graphics card going to explode when it hits 85°C? Will overclocking definitely damage it? These are all misconceptions. This guide helps you understand GPU thermal management logic, tells you when optimization is

Still lagging after swapping in a new router? Full signal bars but high latency in games? 90% of the time, the culprit is channel congestion, not router performance. This guide walks you through systematic diagnosis and

Choosing a gaming console isn't just about "performance" — the game ecosystem matters more: exclusive titles, membership value, and family-friendly gameplay. This guide helps you make the best choice for your needs from

"I bought a big ceiling light, installed it, and then realized it's too harsh and keeps me awake" — this is the most common lighting complaint after renovation. Bedroom lighting isn't just about illumination; it directly

Smart bands advertise "professional health management," but how accurate is their actual monitoring? Which features are genuinely useful, and which are just marketing hype? This guide starts from sensor principles to hel

Wireless charging has evolved from a "slow-charging novelty" to 50W and even higher power levels, but the market is plagued by confusing labels. You might buy a "50W" charger only to find it delivers just 5W in practice.

The Bluetooth speaker market is chaotic, with significant sound quality differences at the same price point. This guide builds a purchasing framework from three dimensions: driver units, acoustic enclosures, and Bluetoot

Many people buy a mouse based solely on price or looks, only to end up with wrist pain after a while, or experience cursor drift and inaccurate clicks. This guide helps you choose the right mouse from four key dimensions

When viewing a property to buy or rent, agents and landlords always show the "best side." This article teaches you a systematic approach to see through the surface, spot hidden issues, and protect yourself when signing t

The "5G capability" gap between phones in the 5G era is enormous. Some phones cost a premium for "5G" but deliver speeds similar to 4G, or even suffer from unstable signals. This article helps you understand the real dif

Buying a projector and pairing it with a poor screen is a waste. The screen's impact on final image quality is no less significant than the projector itself. This article covers everything you need to know about choosing

Many people only look at the price when buying a printer, only to run into problems a few months later – expensive ink cartridges, slow printing, paper jams, and inaccurate colors. This article helps you understand the t

There are too many misunderstandings about mobile phone/laptop batteries - "Charge to 100% before unplugging", "Cannot charge overnight", "Only the original charger will work"... Which ones are true and which ones are rumors? This article will review the working principles of lithium batteries.

"Eye-protecting desk lamps" are the hardest hit area with overflowing marketing concepts - almost every desk lamp claims to be "eye-protecting", but the parameters that really affect eye comfort are not even written on the packaging of many products. This article helps you understand the core indicators of desk lamps.

The second-hand home appliance market is riskier than second-hand mobile phones - problems with home appliances are often deeper hidden, making it harder for sellers to be held accountable. Unlike mobile phones, which can quickly run tests, the power-on test scenarios for major appliances are limited, and the inspection needs to be targeted.

As live broadcasts, home recordings, and online meetings become more and more popular, the demand for "buying a good microphone" is growing rapidly - but there are many pitfalls in this category, and the difference can be several levels within the same budget.

The socket strip is one of the most common electrical appliances in the home. Almost everyone uses it, but how many people have carefully read its rated parameters? Excessive power consumption, inferior sockets, stacking power banks... These daily habits may hide considerable safety risks.

Mobile phone camera specifications are stacked up year by year: from 100 million pixels to periscope telephoto, from multispectral sensors to AI semantic segmentation... Many people are dazzled by it, but they have no idea how these parameters affect the actual photo quality.

Hanging a TV on the wall is something that many people want to do but dare not do when decorating - they are afraid that the wall is not strong enough, they are afraid of choosing the wrong hanger, they are afraid of drilling holes in the wrong position and causing the TV to become skewed, and what to do if it falls. In fact, as long as you understand a few key parameters, this matter is easier than imagined.

NAS (Network Attached Storage) is a small server specially used to store data. It is placed at home and connected to a router. It can be accessed by mobile phones and computers. It can also automatically back up photos and build a private theater. More and more people are starting to use them, but many of them end up in the dust after buying them—because they didn’t know what they needed before buying them.

After switching to gigabit broadband, the router is still an old model, and the network speed still cannot be improved; after buying a "flagship" router, the signal in the bedroom is still only two bars - this kind of problem occurs in almost every household, and the root cause is that the core logic of router purchase is not understood.

Solid-state drives (SSDs) are the most obvious upgrade direction to speed up computers, but the product parameters on the market are confusing—some 1TB cost less than 300 yuan, and some cost 800 yuan for the same capacity. What’s the difference? Most consumers can't tell the difference, and the pitfalls are mainly concentrated in the three areas of interface, protocol and cache.

Many people buy graphics cards only focusing on the benchmark list, but after buying them they find: unstable frame rate, insufficient memory, blurry high-resolution graphics, and lags when playing certain games. The problem usually lies in a few core parameters that are easily overlooked.