Radio emergency call transmitter, enables the triggering of a panic alarm or a call for help or the control of switching outputs on the System 9000. Can be worn around the wrist or neck (carrying strap included). The control center can be used to signal sirens, displays or switching outputs or via app or telephone. Activation can be signaled acoustically for 5 seconds before forwarding and can be acknowledged within this time. Occupies an address in the system. Radio frequency: 868MHz. Power supply: lithium battery CR2032 3V (included). Splash-proof (IP44), operating temperature: -25 to +50°C. Size about the same as a wristwatch. Dimensions: 42 x 46 x 15mm. Weight: 25g.