New Landing 7 Inch Tft Lcd Video Door Phone Intercom Wireless Doorbell 2.4GHz launch frequency, Approx 300meters barrier free remote control distance; With micro-processing technology, auto-remote control, excellent performance and high reliability; 7" TFT color display; 0.3Mega pixel camera; Clear night-viewing; 24hours monitoring, calling, speaking and unlocking remote controlling etc;