It's E Bike Anti-theft Mp3 Alarm System. It can play music and set alarm E Bike Anti-theft Mp3 Alarm System Features:1)Mp3 player+Anti-theft alarm system2)Low power consumption3)Hi-Fi FM Radio/MP3 player with Mini SD card4)New 5-botton Transmitters5)Machine body is made of all aluminum alloy The product functions:1)E bike mp3 alarm2)Anti-theft  alarm system3)Fm radio and mp3 player with SD card4)The product has achieved patent Technical Parameters:

Model	EM1
Brand Name	BODYGUARD
Voltage	36-72V
Static working current	<4.5mA
Dymamic working current	<100mA
Music playing working	<2A
Loudspeaker loudness	125+/-5db
Working frequency	433MHZ

                          two remote controls                       two music speakers           blue/ red/ yellow/ black/ whie/ transparent, you can choose any one           the host ,you can insert U disc and mini SD card here                       a set e bike anti-theft mp3 alarm system has these parts                         company details 

E Bike Anti-theft MP3 Alarm System