1.Instrument main body
2.Control buttons(6 pieces): function selection and setting
3.LCD monitor: display the measuring result
4.Measurement switch: measuring by press this button
5.Control lever: to adjust the position of the window by front/back/right/left/up/down
6.Clamping knob: when transportation or movement the instrument, please screw this knob
7.Clamping knob for base: to fasten the upside of instrument
8.Power switch: turn on or turn off the instrument
9.Inlet
10.RS-232C OUT terminal: connect with external instruments
11.Base unit: hold up main body
12.Printer: print the measuring result
13.Forehead rest: for customer to lean on
14.Power lamp: power on and normal working, this lamp is light





















