433 MHz 4-Channel Wireless Remote Receiver Module, DC 3-5 V Product overview: This compact 4-channel receiver module accepts 433 MHz remote signals and supports learning code pairing. It offers three selectable operating modes, four independent outputs, and a stable reception range suitable for through-wall use. The module is designed for easy integration into DIY electronics, remote control projects, and basic automation setups. Key benefits: - Simple setup and fast pairing: built-in learn button and indicator LED make remote binding quick and clear. - Flexible control options: three working modes let you choose momentary, toggle, or interlock behavior to match different applications. - Multi-channel independent control: four separate outputs labeled A B C D provide independent switching for multiple devices. - Compact and low-power: small form factor (16 x 23 mm) and DC 3 to 5 V operation allow integration into battery or low-voltage systems. - Reliable reception: sensitive 433 MHz receiver delivers 15 to 25 meter range through walls for dependable remote operation. Main features and specifications: - Product name: 4-way wireless learning remote module. - Operating voltage: DC 3 to 5 V. - Operating frequency: 433 MHz with learning code mode. - Remote range: 15 to 25 meters through walls, depending on environment. - Module size: 16 x 23 mm. - Outputs: four independent outputs named A B C D. - Wiring: connect + to the positive supply and - to the negative supply; ABCD are output pins. - Output default state: standard output is low; when a paired remote button is received the corresponding output goes high. To change the module to default high output, short the J1 pads. - Working modes: momentary, self-locking toggle, and interlock, selectable by the boot-time mode setup procedure. Learning and pairing procedure: - Pair channel A: hold the learn button until the indicator blinks once, release, then press the remote button that should be assigned to A. The module LED will blink three times and stop when pairing completes. - Pair channel B: hold the learn button until the indicator blinks twice, release, then press the remote button to assign to B. The LED will blink three times and stop when pairing completes. - Pair channel C: hold the learn button until the indicator blinks three times, release, then press the remote button to assign to C. The LED will blink three times and stop when pairing completes. - Pair channel D: hold the learn button until the indicator blinks four times, release, then press the remote button to assign to D. The LED will blink three times and stop