Features Sensitive and precise: with the sensitive chip, the measurement is fast and accurate without waiting for preheating, plug and play. 10 WAVE LENGTHS This optical power meter can test standard wavelengths of 850 980 1270 1300 1310 1490 1550 1577 1625 1650nm. MULTIFUNCTIONS: The meter has the functions of relative power calculation, calibration, high brightness LED light, backlit screen display, etc., very convenient. UNIVERSAL INTERFACE: Designed with universal interface, supports FC SC ST adapter, can cover most requirements of communication technology. Low power consumption: the battery consumption is low and supports more than 120 hours of continuous operation. Specification: Element Type: Optical Power Meter Material: ABS Model: TM570AL Wavelength Range: 800-1700nm Optical connector: universal connector (SC FC ST) Interface type: InGaAs Measurement accuracy error: <±5%. Standard measuring wavelength: 850 980 1270 1300 1310 1490 1550 1577 1625 1650nm Display resolution: linear display 0.1%, logarithmic display 0.1dBm Identifiable frequency: 270Hz, 300Hz, 1kHz, 2kHz Power supply: lithium battery 3.7 V capacity 700 mAh (built-in) Interface: Micro USB Battery life: ≥120 h (optical power meter function). Automatic shut-off time: 10 minutes. Package list: 1 x optical power meter. 1 x USB cable. 1 x user manual (English language 1 x neck strap Package List 1 x Optical Power Meter 1 x USB Cable 1 x Manual 1 x Lanyard