56 channels, 7 frequency band wireless receiving. Two buttons for channel and band exchange individually.Twonumber display, timely locate the current receiving frequency and band When power on, storage memory shows channel and frequency of the last time. Two-way video and audio signal output ( video: PAL, NTSC,CECAM ; Audio:6.5MHz) 5dB sensitivity gain more than normal receivers,Wide supply( 12v) Operation : After powering on and turning on the digital tube, it will display thelast saved frequency band and channel. 1. lmplement module channels through two buttons CH, frequencyband Regulation of FR.1 : Frequency band adjustment:In the initial startup state, press the FR button to adjust the currentfrequency band. Short press the FR button (about 0.5s) once toswitch the frequency band from 1 to 2, and the digital display willswitch from l to 2; Short press the FR button again (about 0.5S).the frequency band will jump from 2 to 3, the digital tube willdisplay from 2 to 3, and so on. The frequency band will bedisplayed in sequence at . Loop between E.F.R.L.X, digitaldisplay shows loop between 1.2.3.4.5.6.7.2: Channel adjustment:Press the CH button to adjust the current channel. Short press theCH button (about 0.5s) once to switch the frequency band from 1 to2, and the digital display will switch from 1 to 2, Short press the CHbutton again (about 0.5S), the frequency band will jump from 2 to3, and the digital display will go from 2 to 3... and so on, thefrequency band will cycle between 1.2.3.4.5.6.7.8, and the digitaldisplay will cycle between 1.2.3.4.5.6.7.8. Due to different product batches, the appearance , which does not affect the use Colour:Gray Material:Aluminum alloy Package Contents: 1x Transmitter 1x 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.