Motion sensing goes high tech! The FIBARO Apple HomeKit enabled Motion Sensor uses Bluetooth low energy technology. Along with detecting motion, the multisensor accessory measures the ambient temperature and light intensity. The sensor has a built-in accelerometer to detect any tampering with the accessory. IIt is battery powered and designed to be installed quickly and easily on any surface. The eye shaped LED indicator signals motion, temperature level, tampering and can be used to identify the accessory.