On-wall button controller, four buttons

Specifications:
- Supply voltage: 3V CR 2032 battery
- Battery life: approx. 5 years
- Buttons: 4
- Communication protocol: RFIO, 866-922MHz
- Range: up to 200m (open space)
- Operating temperature: -10º a 50ºC
- Protection: IP20
- Dimensions:
- plastic: 85 x 85 x 16mm
- metal, glass, wood, granite: 94 x 94 x 16mm
- Weight: 39gr (plastic)