This incredible new product is adopted with 3- D sound coding technology, which maintains the hi-fi effects of MP3, MD, CD and TV. It has been developed from frequency phaselock loop technology, which ensures stable frequency radiation while functioning at a distance of up 30 Mt with no dead areas. It operates thorough you automobile audio sounding equipment so that you can still enjoy HI-Fi music. Electronic Characteristics: 1.FM Radiation Section 2.Operating Distance: up to 30meters 3.Separation Degree from right and left: 70DB 4.Working Current: 50mA±10mA 5.Input Frequency: 20~18KHz 6.Output Frequency: 107.7 7.Power supply:5V CE/FCC MARKED