Features: Auto-off function and with large LCD display High measurement accuracy and display resolution It can display fast-tracking and real-time measurement of optical power whrn output power changes Quick response and measurement. Wide measurement range: it can provide 70dB of optical power measurement wIth 6 calibrated wavelength: 850nm,1300nm,1310nm. 1490nm,1550nm,1625nm. Specifications: Wave length range: 800-1700nm Light efficiency detector type: InGaAs Light efficiency measurement range: -70~+10dbm Light efficiency resolution rate: 0.01nw or 0.01dbm Connector type: SC Design wave length: 850/980/1300/1310/1490/1550/1625 Red light export standard: 10mW/650nm Number storage: Up to 250 Storage method: dbm Own school deviation amount setting range: -5~+5dbm step 0.1dbm Network crystal for head test: standard Rj45 Battery specification: Need 3 AAA batteries(without Battery) / 3.7V 300mA Rechargeable Charging time: less than 3 hours Charging port: Micro-USB Attrition: Max 85mW Battery usage time: Rechargeable battery more than 30 hours ；Dry battery more than 48 hours(Vary) Size: approx 92x58x27mm/3.62x2.28x1.06in Optional Type: Red Light AAA Battery Type / Red Light Rechargeable Type/ AAA Battery Type without Red Light/ Rechargeable Type without Red Light Package Includes: 1 PC x Fiber Optical Cable Tester note: Batteries are not included in the package. Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.