Wireless doorbell button for the 9000 system, can also be used as a panic button or to control switching outputs. Occupies an address in the system. Radio frequency: 868MHz. Power supply: 2 x lithium battery CR2032 3V (included). Protection class: IP65, operating temperature: -25°C to +50°C. Dimensions: 78 x 47 x 28mm. Delivery includes a nameplate that can be written on and a transparent plastic cover.