... .With build-in memory flash and USB port 2.MP3 player module, sound ic module, USB voice module, audio module , custom ... under key control mode.*Download the sound files by Mini USB with our PC software (free)*Operating voltage: DC5V.*Standby ... Applications1. Voice for anti-theft alarm,reversing radar,GPS Navigator,dongle,central Locking2. Intelligent home system ,Home Burglar Alarm,Medical Devices3 ...