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Mengshen Motion Sensor Alarm, Wireless Doorbell Alert for Front DoorDoor EntryDrivewayMailbox, Home Security System Kit with 1 Sensor and 1 Receiver - YBQ04Item Type:Infrared Detector Alarm Model: MS-YBQ04 (1* Infrared Sensor + 1* Receiver) Power Supply Receiver host: 3*AA battery( Not included ) or micro USB, Infrared sensor: 3* AAA battery( Not ..

Mengshen Motion Sensor Alarm, Wireless Doorbell Alert for Front DoorDoor EntryDrivewayMailbox, Home Security System Kit with 2 Sensor and 1 Receiver - YBQ042Item Type:Infrared Detector Alarm Model: MS-YBQ04 (2* Infrared Sensor + 1* Receiver) Power Supply Receiver host: 3*AA battery( Not included ) or micro USB, Infrared sensor: 3* AAA battery( Not..

Mengshen Motion Sensor Alarm, Wireless Doorbell Alert for Front DoorDoor EntryDrivewayMailbox, Home Security System Kit with 1 Sensor and 2 Receiver - YBQ041Item Type:Infrared Detector Alarm Model: MS-YBQ04 (1* Infrared Sensor + 2* Receiver) Power Supply Receiver host: 3*AA battery( Not included ) or micro USB, Infrared sensor: 3* AAA battery( Not..