Freq range :87MHz-108MHz Power : 1.5W or 15w Tuning Step : 100khz Channel: stereo overall dimensions: 180x125x48MM RF output impedance:50 Power supply in: DC12V6A Stabilized way:PLL Reference range:2--12K (This is not absolute, empty ground, the antenna is installed in the high place, the effect be better) Audio input interface: 3.5mm headphone connector and Lotus interface Colour:Silver Material:Metal Due to different batches, the appearance and printed words slightly Package Contents: 1 * Audio Transmitter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.