mitter parameters: Mediation Type: FM; Receive frequency: 0.9~1.2GHzReceiving signal: audio and video, image synchronous mission; Receiving sensitivity: -85dBmVideo input level: 1Vp-p; Audio input level: 1Vp-pWorking temperature: -20~+50C/-4~+122H; Working humidity: 85%RHStorage temperature: -40~+80C/-40~+185H; Voltage: DC+12VCurrent: 500mA mission power: 1500mWWorking frequency band: 1.2G/1.3GChannel selection: 8-channel audio and video synchronization mission distance: (open and unobstructed) more than 1 km (directly related to the gain of the antenna and the external environment)Receiver parameters:Working frequency band: 1.2G/1.3GWorking voltage: DC12VWorking current: 250mAChannel selection: 12 channel selection, digital displayDue to different batches, there may be differences in product appearance, color, and printed text, which will not affect the useColor: Gold & SilverMaterial: metalPackage Contents:1 x 8 channel wireless mitter1 x 12 channel wireless audio and video receiver1 x Receiver audio and video cable1 x mitter audio and video cableOnly 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.