Elife 3.5 inch LCD Digital HD Monitor Display 170 degree Wide View Angle Digital Peephole Door Viewer video door phone Security Camera Monitoring with Night vision LEDs 3.5 inch Ultra bright TFTLCD display. Sensor: 300,000 pixel CMOS digital image sensor, 170 degree wide angle. Monitor outside anytime when press monitor button. 16pcs Chord music which can be selected as doorbell ring. Easy to install and operate.