Features DUAL WAVELENGTH: This optical fiber power meter features single mode dual wavelength 1310nm and 1550nm, with stable light source. FAST AND ACCURATE: This mini optical power meter offers fast and accurate readings, is easy to use, and requires no warm up time. MULTI FUNCTION: Equipped with relative power calculation and calibration function, the fiber optic power meter ensures maximum accuracy and reliability. LONG BATTERY LIFE: With low power consumption, the optical fiber power tester can work continuously for up to 120 hours. RJ45 LINE FINDING: The optical light source has a RJ45 line finding function, meeting daily network communication maintenance needs. Specification: Item Type: Optical Fiber Power Meter Material: ABS Model: AUA M1315 Wavelength: 1310nm 1550nm Output Power: -5dB Optical Connection: SC FC, 2.5MM Universal Power Supply: Require AA battery x 2 (Not Included) Output Stability: ±0.05dB/15MIN, ±0.1dB/8H Modulation Frequency: CW, 270Hz, 1KHz, 2KHz Package List: 1 x Optical Fiber Power Meter 1 x SC Adapter 1 x FC Adapter (Installed On The Device) 1 x User Manual Package List 1 x Optical Fiber Power Meter 1 x SC Adapter 1 x FC Adapter (Installed On The Device) 1 x User Manual