SONOFF RF-REMOTE Controller RF 433MHz

SONOFF RM433R2, 4-button RF433 remote controller  Features: The remote control operates at RF 433 MHz frequency. 4 buttons control 4 different Sonoff devices. Compatible with Sonoff RF, Slampher, 4CHPRO, RF Bridge, TX series wall switches and other devices supporting 433MHz communication protocol. Modern design, compatible with Sonoff wall switches, blends seamlessly into the interior. Note: battery is NOT inluded.
 Technical specification:  Compatible with: Sonoff TX series, RF Bridge, 4CHPRO etc. Frequency: 433MHz. Transmission distance: 20-30m. Number of buttons: 4. Supported battery: 1x 12V / 27A (battery not included). Material: ABS. Safety class: V0 fire-retardant. Dimensions: 50mm x 30mm x 12mm. Weight: 27g. Colour: black/blue.
 Warranty: 24 months.