Antenna terminal: There is an RF antenna on this product, which is mainly used for the external antenna configured by the user controller. When in use, connect the antenna interface on the user controller to the antenna terminal of this product with a wire. Power supply terminal: the interface used to supply power to this product, the power supply voltage range: DC/AC12-220V. Jumper terminal: used for the selection of always-on mode (NOR) or flashing mode (FL), change the position of the jumper cap as needed. Pass the power and antenna wires through the sealing plug on the bottom case; tighten the screws and complete the assembly of the upper case. After completing the above wiring steps, lock the flashing light on the bracket, and then fix the product to the corresponding place according to the needs of use. Input voltage:DC/AC:12V-220V Working current:Less than 200mA @12VDC Intensity:Greater than 100Lm 1.5W (3 x LED) Operating mode: 1. bright, 2. flicker (flicker frequency:1HZ) [This mode is selected by jump cap] Interface: 1. Power interface, 2. Antenna interface Operating temperature:-10℃-60℃ Storage temperature:-20℃-70℃ Product Weight:75.5g(without accessories) Color:As Shown Material:plastic Package Contents: 1 * LED Signal Alarm Light 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.