... . Digital display screen. LCD: 3.5" TFT Power supply: DC Wireless Intercom System, Color Video Door Phone Christmas Promotion! This system operates ... any communication wire.You can use the system where the wireless signal can resch,such as dining room,living room,balcony ... Standby 40mW; MAX 12W 200 meters distance, Stable,Call,monitor,intercom, unlockOne camera can connect to 4 monitors and one monitor ...