... Alarm Unit. it provides 4/8 relay drivable outputs(12V-24V),4 Analog Inputs and up to 8 NC/NO inputs ... NC NO device>>UP TO 8 Relay outputs drivable (12V-24V),drive electricity <0.2A >>*4 Analog inputs, 0-53mA, 10 ... Upgrading,GSM SMS Controller,RTU5011,Temperature UP DOWN remote control,24V DC Switch,NC NO sensor control