Product overview A compact 433 MHz receiver module designed for remotecontrolled wall switch applications. The KR2201G4 provides stable RF output, easy pairing, and broad compatibility with common ASK remote encodings. It fits standard 86 size wall switch mounting and accepts one CR2032 coin cell on the paired wall switch (battery not included). Key benefits Simple installation and setup that reduces installation time and minimizes wiring complexity. Stable ASK superheterodyne reception for reliable remote control performance. Stores up to 25 remote controls, allowing multiple users or multiple transmitters per receiver. Wide operating voltage range for flexible use with standard AC supplies. Technical specifications Model: KR2201G4 433Mhz Receiver Module Working voltage: AC 90V to 250V Quiescent Current: 108 dbm RF operating mode: ASK superheterodyne wireless reception Receiving range: open space more than 50 meters; indoor with partition walls about 15 meters Amount of storage remote controls: 25 pieces Support encoding: 1527 Leaning code, 2262 fixed code Wall switch size: 86 standard size Switch battery: 1 pcs CR2032 coin cell battery, not included Installation and pairing 1. Open the battery compartment of the wall switch as indicated and install one CR2032 coin cell correctly. 2. Connect the receiver input to AC power. 3. Press the receiver learning button two times in succession. 4. Press the desired key on the remote panel once. When the receiver red indicator flashes and then turns off, pairing is successful. Reset To clear existing paired remotes, press the receiver learning button eight times. All stored data will be deleted. Typical applications Remote control of lighting circuits in homes, offices, or meeting rooms where wallmounted wireless switches are preferred. Control of motors or rollers such as small garage doors or window shades when combined with suitable relay modules. Remote on and off switching for appliances or devices that require a reliable longrange receiver and multiple remote pairing. What is included 1 x KR2201G4 433Mhz Receiver Module Notes CR2032 battery for the wall switch is not included. Ensure installation is performed per local electrical codes and by qualified personnel when required.