Roule RL-A17SF 7-Inch TFT HD Color Digital Video Camera Intercom Best value, 1 indoor monitor control unit, 1 outdoor unit with camera, 1 security doom camera. 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.