PIR (Passive Infrared) Wireless Remote Sensor & ReceiverWireless RF Transmission up to 300’The Receiver Will Alarm or Chime when the Remote Sensor Detects MovementAlerts You When a Vehicle Enters Your Driveway, When Intruders Are in Restricted Areas, or if Unwanted Animals Enter your Property or HomeSound Switch (Hi/Low)Selectable Alarm/Chime/Off SwitchChime Sound Level: 85dBAlarm Sound Level: 105dBBattery Low Indicator for both Transmitter and ReceiverTrigger Flash LED IndicatorWater Resistant Wireless SensorPower: Receiver: 3 x ‘C’ (UM-2) (Not Included) and 120V AC Adaptor (Not included)Sensor: 1 x '9V' (Not Included)