... minutesAutomatic save REF, wavelength, attenuation before shutdownSupport both battery and AC adaptersRS232 serial communication and control functions, suitable for automatic test ... mode, SMFConnector typeFC/PCComputer interfaceRS-232 / Mini USB 5PINPower supplyAC/DC adapter: input 100-240VAC, 50-60Hz, 0.2A max; ouput 5VDC ...