Xtreme Life 720P Night Vision Smoke Detector (Bottom View) - SC7200HD Our bottom-view Smoke Detector hidden camera incorporates battery operated surveillance, HD video resolution, night vision and a built in DVR recording system. Now Using a Wide Angle Lens XL Captures More of your Scene than Ever Before Long Lasting Rechargeable Batteries using PIR Sensor Provide Up To 90 days of Operation (16 hours continuous record) Digital CMOS camera with 720P Image Censor Provides Clear Captured Video