... file destroyed by instant power-offRS485, RS232, speed input interfaceBlack box for vehicles , recording 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- ...