GreenBlue GB212 Wireless input siren, motion sensor 52 white tunes, 230V, max. 8 sensorsGB212 wireless input siren GB212 is a compact input signaling device with pir motion sensor. By using a motion sensor to trigger the sound signal, it can be used as an alarm or an input indicator. In addition, we can use the sensor to ensure the safety of children installing sensors where they should not enter and informing us when they appear in the field of view of the sensor. The pir sensor only detects the movement of people and large animals, so