Roule RL-B17F 7" High Definition Color Video Camera Intercoms Entry Access Control System Door Phone Doorbell Door Viewer Night Vision Home Security Surveillance System Waterproof Damage-proof Comes with an adaptor and 49 ft cacble for do-it-yourslef, 16 different chord melodies 7" TFT high definition screen with low power consumption, no radiation. Ultra thin designed indoor unit with touch pad. Electronic door lock release function. Water-proof, damage-proof, oxidation-proof and abrasion-proof zinc alloy panel outdoor unit. Outdoor gate control function.Outdoor monitoring, 16 different chimes for option.