Main characteristics kivos kdb307a peephole viewer 1.Picture taken automatically and manually 2.Best for apartment, office and hotel, doorbell function 3.3.5inch lcd screen 4.170degree wide lens 5.Suit to the door hole: 14-35mm, door thickness 40-95mm 6.Good quality 7.Nokia chargeable lithium battery 8.Connect holder design, handheld check
