inercom (TM) 7 inch Lcd Wireless Video Door Phone Intercom & Touch Key with 3pcs Lcd Monitors door bell,Doorbell Home Security 2.4GHz launch frequency, Approx 300 meters 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.Monitor can take/save/view more than 100 photos automatically Clear night-viewing, 24 hours monitoring, calling, speaking and unlocking remote controlling etc. Time shown on the indoor monitor. Rechargeable lithium battery through mini use charger.