FLYTOP 2.5W 4.9G 5.8G High-Power VTX FPV Aircraft Model Penetrator Image Transmission Module 56CH with Antenna FLYTOP-VT25  Frequency: 4.9g/5.8 G (adjustable)  Output power: 0-25-400-800-1500-2500MW  Input voltage: 6-36v  Tuning Mode: Key/OSD  Current: ≤450mA@12v, 800mw; ≤800mA@12v, 2500MW;  Output Frequency: 56CH (A-B-E-F-R-X-L)  Antenna interface: MMCX  Mounting hole location: 2*2cm/0.79*0.79inch; 3.05*3.05cm/1.2*1.2inch  Weight: 14.9g (without antenna and power cord)  Video format: NTSC/PAL automatic detection Instructions and Precautions 1. Button Adjustment for Frequency and Power: Frequency Control: Press the button once briefly to switch between 1CH-8CH. Frequency Group Control: Hold the button for 3 seconds until the RF (frequency group) light starts flashing and all other lights turn off, indicating that you have entered the frequency group switching mode. Then, press the button briefly to switch between frequencies A-L. Power Control: Hold the button for 6 seconds until the R (power) light starts flashing and all other lights turn off, indicating that you have entered the power adjustment mode. Then, press the button briefly to switch between 25mW-2500mW.