CP-V41SB
4" B/W Video Doorphone, IP44 waterproof and damage-proof outdoor unit, Nano-glass cover promises clear image, Electric-controlled unlocking, Night vision, Melody volume and talk volume adjustable, Enclosed an adapter and 15m cable

CP-V71SM
Memory Video Door Phone, perpetual calendar, digital clock, Support memory cards such as SD,MMC,XD and MS cards.Max volume: 8GB, A-class 7" color screen with no radiation, Anti-oxidant aluminum alloy outdoor unit, Hands-free intercommunication, Electronic controlled unlocking, Night vision, Enclosed a 2GB memory card, a switch power supply and 15m cable for DIY installation