Fiber Tester, Calibration Certificate None, Connector Type LC, APC, MM, SM, UPC, Adapters Included 1.25 mm, Alert Type Light, Fiber Mode Measured Multi-Mode, Single-Mode, Product Type Fiber Optic Tester, Testing Functions Fiber Verification, Auto Power Off Yes, Battery Chemistry Alkaline, Battery Size AAA, Display Screen Type LED, Features Light beat(TM) Flashes to Indicate Operation and Battery Status, Includes (2) AAA Battery, Includes Batteries Yes, Manufacturer Warranty Length 2 yr