1PC Infrared Induction Wireless PIR Doorbell

1PC Infrared Induction Wireless PIR Doorbell, Safety Reminder Announcer, Suitable For Company/family/villa/shopping Mall Welcome to the sensor no smoking infrared human body induction voice prompter color: White Material: ABS Weight: 0.6Kg Specification: 60mm*22.6mm*90mm Power supply: USB/3 x AAA batteries (not included) Audio: only supports MP3 Volume: two levels Detection distance: up to 4m Speaker: Built-in 8&; 1W speaker Memory: Built-in 32Mbit (4Mbyte) flash memory Memory expansion: support feature: Only supports playing MP3 audio, with two levels of volume optional. Human body sensing, sensing distance up to 4 meters. Built-in 8&;1W speakers, built-in 32Mbit (4Mbyte) flash memory. Two play modes: full loop play and single loop play. Press the A button to play the previous audio, and press the B button to play the next audio. Download audio files from your computer via the USB interface. Power supply: three AAA batteries or USB power supply. Scope of application: companies, families, villas, shopping malls