Wolfwhoop SP61CRS PIR Motion Detection Camera Ultra Loud 130-dB Sound Night Vision Support Alarm with Auto Dial and Remote Controller-silver Ultra loud 130dB siren to drive intruder away and notice your surroundings Motion-activated DVR recorder allows camera to capture video footage of alarm events and record only when alarm triggered Supports silent mode to mute the alarm manually during the emergency callout and video recording so not to frighten the intruder at first Simple operation and DIY installation, no wiring required. Base unit uses 3pcs alkaline batteries,Long lasting battery life with low power consumption design All-in-1 motion alarm, night-vision camera with DVR function and auto phone dialer all built together with professional-grade quality to protect property