Sure, you may use your laptop USB port to charge detector. Furthermore, you can charge the detector with any of cellphone or tablet charger as far as the output voltage is 5V DC.
YES! It detects both wired and wireless cameras, all kind of camera lenses are processed by special coating, which is very easy to reflect light, based on the principle of light reflection, if you watch through the observation window of the detector, the "bright spot" reflected by the camera lens can be observed, no matter the camera is turned on or not.
The possibility can be that you are in a room full of signal sources, such as Wi-Fi routers, signal amplifiers, Bluetooth-connected devices, etc., To rule out it is caused by too many electronic devices around you, I suggest you try it in an environment with few electronic devices, or take it outdoor, if the detector doesn’t beeping any more or less beeping, that means you should pay attention the environment where you use.
We noticed that there are detectors of our JMDHKK brand sold on other platforms, we presume they are imitations, we have exclusive ownership of the JMDHKK brand and only sell it on Amazon, we have not authorized any other sellers. In our product user’s manual has detailed contact information and warranty information.
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