... delay for data protection6. RS485, RS232, speed input interface7. Black box for vehicles- record speed, position, acceleration,temperature, brakes, backing up ... input6 CHAlarm output2 CHBuilt-in Modules OptionalGPSGPS moduleExtended InterfaceRS2321RS4851SPEED interface1 Speed sensorPower & ConsumptionPower inputDC8V ~ 36VPower output4 channel DC12V 2AConsumption6W-12WDimension123mmx138mmx45mmNet ...