With ring when somebody pass by, with warning alarm function Product size: 11.6*6.9*6.4cm Power: 1*6 R6 batteries(9V)

With ring when somebody pass by, with warning alarm function.

Product size: 11.6*6.9*6.4cm.

Power: 1*6 R6 batteries(9V) (not included)

PIR Alarm Doorbell