Product advantages: Small size, easy to install. This product can be installed in small concealed spaces, with flexible control for outdoor advertising, engineering special equipment, digital circuit electrical interfaces, LED control, etc Product frequency: 433MHz (other frequencies can be customized). Working voltage: DC12V Working mode: jog interlock self-locking delay.Clear code operation: Long the learning button until the LED flashes and goes out, and clear the code successfully (change mode requires clear code first). Output method: Dry contact output (switch signal) learning method: Tap code: After connecting the power, the learning button and release it. The LED flash once to enter the learning mode. the A button on the remote control, and the LED flash and turn off, indicating successful learning. Self locking code matching: After connecting the power, the learning button twice and release it. The LED flash twice to enter the learning mode. the A key on the remote control, and the LED flash and turn off, indicating successful learning. Interlock code matching: After connecting the power, the learning button 3 times, and the LED flash 3 times to enter the learning state. the A key on the remote control, and the LED flash 3 times. Then the B key on the remote control, and the LED flash and turn off after the learning is successful. Delay of five seconds: the code matching button on the control board four times in a row, and the LED indicator light flash four times. After the LED indicator light is on, the remote control button that requires code matching, and flash three times in a row to successfully match the code. Delay of ten seconds: the code matching button on the control board 5 times in a row, and the LED indicator light flash 5 times. After the LED indicator light is on, the remote control button that requires code matching, and flash 3 times in a row to successfully match the code. Delay for fifteen seconds: the code matching button on the control board six times in a row, and the LED indicator light flash six times. After the LED indicator light is on, the remote control button that requires code matching, and flash three times in a row to successfully match the code. Color: Yellow Material: PCB Package Contents: 1 x 433MHZ Small Wireless Controller module 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.