Motion Detector Alarm, Siren Motion Detectors Infrared Sensor Wireless PIR Motion Detector Set

Pass-through detector alarm, communication range up to 100m distance between infrared receivers and receiver. The range of the infrared receiver is 3-7 m. Notifies you in advance when guests or intruders arrive. Motion detector alarm with 38 ringtones, you can choose the one you prefer! levels of volume adjustment: High or Medium or Low. Receiver operation mode: single LED flashing light or both sound and LED flashing. Power supply receiver: AC Power supply transmitter: AAA batteries or DC adapters Applications: entry alert, intrusion alarm, courier alarm, critter detector, car alarm indoor, warehouse monitor, power alarm closet, garage and tool shed monitor, mailbox sensor, front door or gateway detection.