Digital peephole door wireless viewer/wireless video doorbell 3.5 inch lcd Main characteristics kivos kdb307a peelhole viewer 1.Picture taken automatically and manually 2.Best for apartment, office and hotel 3.3.5inch lcd screen 4.170 degree wide lens 5.Suit to the door hole: 14-40mm, door thickness 40-100mm 6.Good quality connection wire 7.Nokia chargeable lithium battery 8.Connect holder design, handheld check Specification: No. Specifications Technical parameters 1:power source:bp-6m (1100ma) Adapter, battery of mobile phone: bp-6m (1100ma) 2:camera300, 000 pixels, cmos high-resolution camera 3:display device lcd 3.5” 240*320 resolution 4:sound format ringing 5:memory device 100pcs pictures 6:shooting mode manual and automatic video-recording 7:current in “hold” mode less than 1ma 8:stand-by time >1000 hours 9:charge time 3 hours 10:electrostatic protection >8kv 11:service life of keystroke > 100, 000 times 12:environmental temperature -20°c~+50°c