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 method: 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: 30.5x30.5 mm Video format: NTSC/PAL automatic detection Weight: 12.5 grams (excluding antenna and power cord) Size: 35.5x36.5x10 mm Due to different batches, the appearance, color and printed words of the product may vary, which will not affect the use. Colour:Black Material:Metal Package Contents: 1 x 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.