Transmitter parameters: Mediation Type: FM; Receive frequency: 0.9~1.2GHz Receiving signal: audio and video, image synchronous transmission; 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 Transmission power: 1500mW Working frequency band: 1.2G/1.3G Channel selection: 8-channel audio and video synchronization Transmission 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/1.3G Working voltage: DC12V Working current: 250mA Channel selection: 12 channel selection, digital display Due to different batches, there may be differences in product appearance, color, and printed text, which will not affect the use Color: Gold & Silver Material: metal Package Contents: 3 x 8 channel wireless transmitter 3 x 12 channel wireless audio and video receiver 3 x Receiver audio and video cable 3 x transmitter audio and video cable 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.