voltage: DC 12V Current: 700mA Frequency: 500Mhz optional Frequency band: 460Mhz, 490Mhz, 500Mhz, 520Mhz, 540Mhz, 560Mhz, 580Mhz, 600Mhz Number of channels: 8 channels Transmit Power: 4 watt Video Output: 1 -p(FM) Audio Output: 1 -p(FM) Distance: 20-40km from air to ground; 2-3km NLOS on ground Overall Configuration: Transmitter, receiver, video cable, antenna Temperature: -10℃-+50℃ Due to different product batches, the appearance , which does not affect the use Colour:As Shown Material:Aluminum Alloy Package Contents: 1 * Transmitter 1 * Receiver 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.