1. Comes with power self-test function to quickly check whether image transmission is normal 2. Frequency locking function, which will not interfere with companions when turned on 3. 0-2.5W power adjustable, allowing you to switch seamlessly in different environments Output power:0-25-400-800-1500-2500mW Input voltage:6-36V Parameter adjustment :double button/OSD Working current: Less than or equal to 450mA@12V, 800mW Less than or equal to 850mA@12V, 2500mW Output frequency:40CH (A-B-E-F-R) Antenna interface:MMCX Mounting hole:30.5x30.5mm Video format:NTSC/PAL automatic detection Weight:12.5 grams (excluding antenna and power cord) Due to different batches, the appearance, color and printed words of the product , which will not affect the use. Colour:Black Material:Metal+Plastic Size:35.5x36.5x10mm Package Contents: 1 * FPV 5.8G 2.5W 40CH VTX Kit 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.