• Compatibility: 433.92MHz RF remote control, compatible with all SONOFF products that have the 433MHz RF function, such as SONOFF TX, RFR2/RF3, 4CHPROR2/R3, SlampherR2, among others. • Multiple Device Control: By pairing a T2EU3C-RF switch with two SONOFF 433MHz RF 1-Gang products, you can control two connected lights with a single T2EU2C-RF switch without the need for wiring. Remote control distance over 50 meters. • Two-Way Control: By pairing two or more T2EU2C-RF switches with two or more SONOFF 433MHz RF products, you can control the light from multiple locations without the need for wiring. • Stable Power Supply: Works with a 3V button cell battery, model CR2032 (not included in the package). • Easy Installation: No wiring required. It can be installed in three ways: glued, screwed, or on a surface. • Product Dimensions: 8.6 cm wide, 0.9 cm high, and 8.6 cm long. • Product Weight: 0.08 kg.