IDEAL, Fiber Optic Test Kit, FiberMaster, Wave Length: 850, 1300/1310, 1490, 1550, 850, 1300, 1310, 1550 N-M, Detector: InGaAs, Measurement Range: -60 To +3 DB, Accuracy: Plus Or Minus 5 PCT, Display Resolution: 01, Connector: Universal 2.5mm With FC Adapter, 2.5mm With ST, SC, FC Adapters, Power Supply: AAA Alkaline Battery x 3,, Operating Time: 360, 40 HR, Operating Temperature: -10 To +60 DEG C, Storage Temp: -25 to +70 DEG C, Output Power: -6 To -7 DBM Typical