High-quality Music can from the acoustics when connecting with the Portable Harddisk,U DISK and MP3/MP4 player directly.It has seven channels for choosing. It can take the convenient, fashion, and superior for people. 1.This incredible new product is adopted with 3D sound coding technology, which maintains the Hi-Fi effects of MP3,MD, CD and TV. 2. It has been developed from frequency phase lock loop technology, which ensure stable frequency radiation around 30 meters without dead areas.let person enjoy digital music from the U-disk,MP3 player and other portable music equipment with your Hi-Fi FM radio equipment in car or in home. 3. It can connect with the mobile phone and portable music equipment at the same time. Product Specifications: 1. Operating Distance: Up to 30 meters." 2. Channel Isolation Ratio: ≥72db 3. Frequency Range: 20-1500Hz 4. Working Current: 45mA±10mA 5. Operating Frequency: Labeled on the unit 6. Output Current: 100 mA max (According to different model) Online service skype ID: robin926, ICQ ID: 300 732 551, MSN ID: cordialrobin contact person: Mr Robin Yang