Supply current:130mA. RF input:50ohm SMA. Video output voltage:1.0Vp_p75ohm. Audio output voltage:1.0Vp_p10Kohm 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 the last saved frequency band and channel.Implement module channels through two buttons CH,frequency band Regulation of FR 1: Frequency band adjustment: In the initial startup state,press the FR button to adjust the current frequency band.Short press the FR button(about 0.5s)once to switch the frequency band from 1 to 2,and the digital display will switch from 1 to 2; Short press the FR button again(about 0.5S),the frequency band will jump from 2 to 3,the digital tube will display from 2 to 3,and so on.The frequency band will be displayed in sequence at .Loop between E.F.R.L.X,digital display shows loop between 1.2.3.4.5.6.7 2: Channel adjustment: Press the CH button to adjust the current channel.Short press the CH button(about 0.5s)once to switch the frequency band from 1 to 2,and the digital display will switch from 1 to 2; Short press the CH button again(about 0.5S),the frequency band will jump from 2 to 3,and the digital display will go from 2 to 3...and so on,the frequency band will cycle between 1.2.3.4.5.6.7.8,and the digital display will cycle between 1.2.3.4.5.6.7.8 NOTE:Please use within the legal limits of your country,mainly using aerial models for viewing beyond visual range Colour:Gray Material:Metal Size:50x50x15mm Package Contents: 1 * receiver 1 * antenna 2 * cables 1 * English manual 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.