Feature: 1. The FLYTOP VTX offers a powerful transmission capability, ensuring strong and reliable video signals for your FPV aircraft activities. 2. Adjustable frequencies of 4.9G and 5.8G allow users to choose the optimal channel for their specific environment. 3. Adjustable output power levels of 0-25-400-800-1500-2500MW ensure optimal signal transmission for various FPV flight scenarios. 4. 56 channels (A-B-E-F-R-X-L), provide versatile frequency options. 5. Featuring key/OSD tuning modes, users can easily adjust settings without the hassle. Specification: 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 detectionInstructions and Precautions1. 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. Package List: 1 * FLYTOP 2.5W 4.9G 5.8G High-Power VTX