New electronics • Tested before dispatch • Tracked delivery
Direct answers about electronics mystery boxes: what is inside, how items are tested, shipping from China, and how to choose a gift size.
Budget smart plugs and bulbs use 2.4GHz Wi-Fi only, and a phone on 5GHz cannot pair them. How to split your router’s bands, what to withhold from the maker’s app, and when a device is really faulty.
Budget projectors print the lamp’s raw output, not light on the wall. What ANSI lumens measure, what a mini projector really delivers, and a five-minute dark-room test that sorts faults from limits.
A drive that says 128GB and holds 8GB fails silently after you copy files on. How the fraud works, the free fill-and-verify tools (H2testw, F3, ValiDrive), how long the test takes, and what to claim.
USB carries power and data, and only data can hurt you. How to sort a mystery box into power-only, charging and storage piles, what the FBI and FCC advice means at home, and what to test elsewhere.
Trackers, remotes and LED lights in a mystery box may run on coin cells. What Reese’s Law requires of the compartment, a two-minute check, and what to do if a child may have swallowed one.
Unbranded is normal; counterfeit is a borrowed name or safety mark. Three marks you can verify in public databases (FCC ID, UL file number, Apple MFi), what fakes look like, and what to do with one.
Power banks are cabin-only, 100Wh is the line where airline approval starts, and an unmarked bank may be refused. How to convert mAh to Wh, what changed in 2025, and a two-minute pre-flight check.
Two USB-C cables can look identical and differ forty-fold in power and data. How to read the USB-IF logo, spot an e-marked cable, test the one from your box, and know which failure is a fault.
Waterproof is a word, not a rating. IP67, IP68 and 5ATM describe still fresh water in a lab, not your shower or your swim. What each code covers, and how far to trust it on a budget watch.
Charge for an hour, photograph the model number, then run six checks: pairing, both channels, microphone, controls, a timed battery run and tip fit. Which results are faults and which are normal.
