It has an ultra-miniature appearance and ultra-light weight, and the built-in microphone can transmit sound in real time. It is especially suitable for small multi- rotorcraft and FPV traversing aircraft Premium PCB board and electronic components are solid and , offering long service life 5-speed power adjustable PIT/25MW/200/400/800/1600MW A great choice for remote control drone The size is only 36x36mm, it only weighs 7.3g, with 40 frequency points,easy to use 40 frequency points Power supply 7-26V (2-6S) Hole spacing: 30.5x30.5MM, diameter M3 Overall dimensions: 36x36MM Precautions: Be sure to install the antenna and power on the image transmitter. Regarding the usage of the buttons (also refer to the frequency table in the following picture, the flight control needs to configure the JSON file we provide to realize OSD parameter adjustment): Short to adjust the channel (corresponding to blue light, 1-8, 8 times in total) and hold for 2 seconds to adjust the group (corresponding to green light, A, B, E, F, R, 5 times in total). and hold for 5 seconds to adjust the power (corresponding to the red light, 25, 200, 400, 800, 1.6W, 5 times in total). and hold for more than 10 seconds to open 11 USA channels. By default, prohibited USA channels are not output: 5705, 5685, 5665, 5885, 5905, 5880, 5658, 5695, 5732, 5880, 5917 (Due to different batches, the printed words on the product be different, which does not affect use) Packing bag/box is random, don't accept the specified Colour:As Shown Material:PCB Package Contents: 1 x -3016W 1 x MMCX-SMAJ Cable 1 x 6P x 1.0MM Plug 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.