1. Ultra-low power consumption design, Less than 100mW 2. Ultra-small mini design, convenient and flexible for customers to install. 3. Unique power supply collinear design. Use this product to save a 12V power supply 4. Convenient, fast and stable press card interface. Installation is more convenient and faster. 5. Only professional grade 5 detonators and 100% pure copper BNC heads are available. Power supply part input power:DC 12V Power consumption:Less than 100mW Video transmission performance compatible with video standards PAL, NTSC, SECAM Signal bandwidth:6MHz Transmission distance: 1200 meters (passive twisted pair reception) 2200 meters (active twisted pair reception) Common mode rejection ratio:Greater than 60dB Signal interface part twisted pair video input port spring type terminal block. Coaxial video output port card pin metric BNC socket, 75 ohm impedance. Common line power output 5mm DC head LED indicates that the power indicator is red, and it lights up when power is on. The signal indicator is green, and it lights up when there is a video signal. Adjustment mode dial switch 0-250m; 250-500m; 500-750m; 750-1000m; Greater than 1000m Protection level of the whole machine: electrostatic protection: contact discharge level 4 (±8KV), air discharge level 3 (±8KV) Lightning-protection level:2KV Appearance size:65mmx27mmx18mm Working environment: working temperature:-15℃-80℃ Storage temperature:-40℃-150℃ Working humidity:0-95% (no condensation) Due to different product batches, the appearance may vary, which does not affect the use. Type:Transmitter Colour:Black Material:Plastic Package Contents: 1 * Transmitter 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.