mitter parameters:Mediation Type: FM Receive frequency: 0.9~1.2GHz Receiving signal: audio and video, image synchronous mission Receiving sensitivity: -85dBm Video input level: 1Vp-p Audio input level: 1Vp-p Working temperature: -20~+50C/-4~+122H Working humidity: 85%RH Storage temperature: -40~+80C/-40~+185H Voltage: DC+12V Current: 500mA mission power: 1500mW Working frequency band: 1.2G/1.3G Channel selection: 8-channel audio and video synchronization mitting distance: (open and unobstructed) more than 1 km (directly related to the gain of the antenna and the external environment) Due to different batches, there may be differences in product appearance, color, and printed text, which will not affect the use Colour:gold Material:Metal Package Contents: 1 x mitter 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.