Features:
1) Body length: 10.5cm, 5cm remain long after plugging into cigarette lighter 
2) Wire length: 120cm
3) Adopts 3D sound coding technology, which maintains hi-fi effects of MP3,MD, 
   CD and TV
4) Developed from frequency phase lock loop ethnology, which ensures stable   
    frequency radiation while functioning at distance of up to 30 meters with no
    dead areas. It operates through your autoMobile audio sounding equipment 
    so that you can still enjoy Hi-Fi music
5) Car audio wireless transmitter with four channel
6) Operating distance: up to 30 meters
7) Channel isolation ratio: ≥72db 
8) Frequency range: 20 - 1,500Hz 
9) Working current: 45mA±10mA
10) Operating frequency: labeled on unit 
11) Output current: 100 mA max. (according to different model)
12) Preset frequency station: 106.9, 107.1, 107.5, 106.7, 87.9, 88.1, 88.5, 88.7

Outer packing:
N.W.: 42g
G.W.: 64.5g