Features: With anti-theft functionSupport USB & SD card to play MP3 music and FMSupport power off memory play and it plays previous music when you turn it onWireless remote controlSpecification: Material: aluminum alloyColor: as picture showsWorking voltage: 12VSound channel: 2 sound channel (stereophonic)FM radio frequency: 87.5-108.0MHzHorn alarm volume: 125dBWireless remote control: about 100MDimension: Alarm audio: about 95 x 65 x 23 mm(L x W x H)Speaker: about 90 x 77 x 70 mm(L x W x H)Cable length: approx 60cm Package included:1 x remote control2 x speaker1 x power cable8 x screws2 x fixed iron platesEnglish user manual on box