... -5C for outdoor unitBuilt-in selectable 12pcs doorbell chimeBoth units with built in antenna1Camera to more than monitors can ... grey ,red or whitePass CE,ROHS approvalWhere to Use it ?It is regularly used in villa ,single house ,single household , ... li-batteryPowerStandby :0.2W,Unlock:12WWireless transmitting rangeUp to 350 meters in open airWorking Temperature59F ~ 131FChannels64Net Weight140g / 0.3 ...