System Door Opening Sensor Wireless Alarm Door Sensor Door Annunciator Window Security Alarm

Label:Yes 4 in 1 Multi-Function --- General Alarm, Constant Alarm, Closing-door Alert (Time Delay), Doorbell. Size: AS The Picture Materials: ABS Package Included: 1pcs Door/window Alarm. Item Type: Wireless sensor Battered by 2pcs AAA batteries (not included).

Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.