CACAZI FA86 Self-Powered Smart Home Wireless Doorbell, US Plug(Black) Filter-Wired Mice This will prevent static electricity

This will prevent static electricity from damaging the electronic components within the device

1 x USB Receiver

Focus range: 20mm

Concealed outer bag to support anti-theft

CACAZI FA86 Self-Powered Smart Home Wireless Doorbell, US Plug(Black) Filter-Wired Mice This will prevent static electricity1. Buttons generate electricity by themselves, no battery is required, and the generator can be turned into electricity by pressing a finger. 2. Long distance without obstacles with a penetration of 150 meters. 3. Digital circuit design, multiple sets of use without crosstalk, effectively avoiding troubles caused by mutual neighbourhood. 4. 60 music ringtones, let us choose more than one. 5. 5 levels of adjustable volume, as you like. 6. The