Newport 2835-C Model Multi-Function Optical MeterCondition:* Powers On and display lights up.* Either missing battery, or battery is bad.* Sold As-Is, For Parts Or Not Working.Additional Notes:* Greatest Possible Versatility in a Single Optical Meter* Pulsed and Integrated Energy Measurements* Includes Both RS-232 and IEEE-488 Interfaces* Sophisticated Automation Capabilities* Wavelength Calibration in 1 nm StepsNewport2835-C