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Package Included: 1*Relay Receiver Switches Module Specifications: Material: Metal and PVC. Product Type: Learning Code (1527) Remote Control Key Fob. RF Frequency: 433 MHz. Channel Supported: Four Channel. Encoding Type: Learning Code(1527). Modulation System: ASK. Operating Voltage: DC 12V. Operating Current: <25mA. Transmitting Power: +13dbm. Frequency Windage: +0.2MHz or -0.2MHz. Transmission Distance: 50m (Free Space). Description: The transmitter supports Learning Code(1527) Common Chip, such as, PT1527, EV1527, etc. Compatible with the most of 1527 Remote Control Relay Receiver Panel. Widely compatible, PT2262, PT2260, EV1527, PT2240, etc. Ultra-wide pulse width range: Oscillation resistance from 105 to 515 is available In jog mode: support combination code In self-locking mode: support combination code In interlock mode: 4 independent opening and closing, combination code all closing In combination mode, the two channels are independent and do not affect each other. Clear: Press the learn code button 8 times, and the LED goes out. After about 3 seconds, the LED flashes 3 times, clearing OK. Learn to code: Press the learning button on the board, the LED will light up, and release the learning button to enter the learning code matching mode. Press any key on the remote control, the LED flashes 3 times, the learning process is OK, and the system automatically exits the learning mode. If there is no remote control signal after entering the learning code matching mode, it will automatically exit the learning code matching mode after 10 seconds. 1. Self-locking: Press the same remote control button, press it once, the relay turns on, and press it again, the relay turns off. 2. Interlock: Press the remote control "A" button, the relay will open, Press the "B" button on the remote control to turn off the relay. 3. Jog: Press the remote control "A" button to turn on the relay, and release the remote control "A" button to turn off the relay. If you keep pressing the "A" button of the remote control, the relay will always be on. When you release the remote control, the relay will be off. Explanation about the purpose of the output signal of LED: When any button of the remote control is pressed, the receiving end decodes, and after correct decoding, the LED will output a high level signal 1. When the remote control button is released, the LED output becomes 0. That is: only when the reception is valid and decoded correctly, it will be output. Notes: 1.This remote control only support the learning code (1527) of the receiver 2.This remote can not be programmed. 3.It will not work if you only have the transmitter. it is parts of the remote control system, it needs work with the Remote Control Relay Receiver module to achieve controlling.