The presence detector for indoor use reliably detects the presence of people by capturing even the smallest movements (e.g., hand movements on a keyboard). Note: This is a kit that needs to be assembled! The integrated twilight sensor additionally detects ambient brightness for actions that should only be triggered at dusk or at night (e.g., turning on the lighting upon motion detection). In conjunction with other Homematic IP devices, alarms can be triggered or lights can be turned on. Optimal detection in an area of up to 7 m and a detection angle of approximately 105°. Automatic adjustment of sensitivity at high room temperatures (e.g., when using underfloor heating). Compact housing – ideal for indoor use. Flexible mounting on ceilings using the included screws and dowels or screw-free via magnetic attachment (available as an accessory). Warning via the Homematic IP app in case of disassembly or tampering due to the integrated sabotage contact. Comfortable configuration and linking via the Homematic IP app (Homematic IP Access Point required) or Smart Home central units (CCU2/3, radio modules for Raspberry Pi, or partner solutions). Operation requires connection to one of the following solutions: Homematic IP Access Point with a free smartphone app and free cloud service, CCU2/CCU3 central unit with local user interface, WebUI, radio modules for Raspberry Pi, or third-party partner solutions.