hot wireless door chime models

1)Transmitting frequncy:2.4GHz,operating range within 150-180m 2)Microprogramming technique,automatic remote control,high performance 3)Receiver screen:2.4inch color TFT 4)Transmitter camera:0.3M pixels CMOS sensor 5)Clear night vision function,24 hours for Monitoring,call in,intercom and unlock by remote control 6)1 receiver with 1 to 6 transmitters(optional) 7)Receiver uses Mini-USB port, built-in high-capacity Li-ion battery; 8)Fireproof ABS,popular appearance 9)Two way radio hands free talking;