NSK7452CX indoor phone Function Calling, Talk, Monitoring, Remote control the lock. Application match to all of the CX and NCX outdoor unit Housing ABS material Screen 4" flat CRT, 3.5" or 4" TFT LCD Adjustments volume, brightness, contrast, saturation Installation method surface mounting Specifications Working voltage AC110V-240V Working current B/ Wd600mA, Colord400mA Max. wiring distance 80m/ 262feet( 22AWG, 4* 0.5mm/ 2, 4* 0.75mm/ 2, Rvv4 cable) Wiring 4wires Talk time 45^ 90sec Relative humidity 45% ^ 95% Ambient tempreature 55 ^ -12 Resolution 380TV lines Video output 1Vpp 75ohm Packing information Products dimension 220* 196* 71MM Inner package 251* 260* 75MM Carton size 430* 290) 290MM Protection level IP54 Weight NW: 1.25kg GW: 1.45kg Certificates CE or other required certificates Business mode Final products, SKD/ CKD, OEM/ ODM available