Features:1) Screen: 4-inch flat CRT (B/W)2) Type: TKS-401A (Sony monitor)3) Rating voltage: 12V DC +/- 10%4) Current:5) Video frequency signal: 0.7-1.4 Vp-p / 7.5-ohm6) Working temperature: -20 –

Functions: 1) Can watch and talk with a visitor through the screen of the indoor unit and unlock the outdoor2) Can call the management machine by pressing "Alarm" key on the indoor unit 3) T

Functions:1) Can watch and talk with a visitor through the screen of the indoorunit and unlock the outdoor2) Can call the management machine by pressing "Alarm" key on theindoor unit3) The u

Functions:1) Can be connected with management machine by the online host2) Single key calls the indoor unit from the outdoor unit3) Unlock or disarm by ID card of the indoor unit4) Can be mated with t

Functions :1) Password: 1 - 6 digits2) Capacity: can be mated with 331 units3) Alarm delay time: 1 – 1,000 seconds4) Monitor time: 1 – 1,000 seconds5) Display: 4 digital6) Alarm number: 3

Functions :1) 4 digital displays in management center2) Management center can be mated with 331 host units3) Direct dialog can be realized between management center and host unit4) Management center c

Functions: 1) The alarm can transmit to a fixed phone or to the online police station 2) Can be equipped with the alarm horn/flash bulb, used for the spot alarm3) Chinese menu supported, easy and simp

Functions:1) One outdoor unit can connect with 1 to 6 indoor units2) Can monitor outdoor unit area from the indoor unit3) The door set is equipped with infrared diodes to ensure clear pictures at nigh

Functions:1) Back lit display for night time visibility2) Can intercom with the indoor unit, and indoor unit can unlockoutdoor unit3) Press the room number key on the outdoor unit to call the indoorun