Ennio 2.4g 7" TFT Wireless Video Door Phone Intercom Doorbell Home Security 1 Camera 2 Monitor 2.4GHz launch frequency, Approx 30 meters barrier free remote control distance, robust anti-interference. Surveillance, wireless unlock, hands-free call and talk. BL-5J battery is replaceable and rechargeable. Monitor can hang on the wall, cabinet, or be place on the desk, table, etc Time, brightness and talk volume are adjustable.