(1) 2.4GHz digital frequency hopping and encryption technology, transmission distance up to 300 meters at open area, robust anti-interference; 
(2) Clear night vision; 
(3) Rain shield for the outdoor camera is available; 
(4) 3.5 inch TFT panel and monitoring all the while; 
(5) Hands-free intercom, Unlocked by wireless control; 
(6) 16 chord melodies and melody volume is adjustable; 
(7) Date (only one outdoor Camera with one indoor monitor is available) and time appears on screen; 
(8) Indoor monitor store up to 100PCS pictures, pictures mark date and time; 
(9) Brightness and talking volume are adjustable; 
(10) MiniUSB charging interface, BL-5J battery is replaceable and rechargeable; 
(11) One outdoor camera support up to 4PCS indoor monitors simultaneously and vice versa;