This is a new, open-box ShinewayTech OPM-50B intelligent optical power meter. It measures optical signal power accurately from -50 to +27dBm, a standard range for many fiber optic testing applications. Free shipping is included with purchase. This tool is commonly used by field technicians for installing, maintaining, and troubleshooting fiber optic networks in telecommunications or CATV systems. Its pre-calibrated status, with a calibration date listed in the description, provides confidence in measurement accuracy. It is a practical device for professionals requiring reliable power level verification. Always confirm specific connector types and full technical specifications directly in the listing before purchase. ShinewayTech OPM-50B Intelligent Optical Power Meter -50 ~ +27dBm. Condition: New – Open box. Listed at 363.20 USD. ShinewayTech OPM-50B Intelligent Optical Power Meter 850,1300,1310,1490,1550,1625nm -50 ~ +27dBm Condition: Like new. Does not include OPM data analysis software CD, or Soft carrying case. What you see is what you get. Description: The OPM-50 Intelligent Optical Power Meter from ShinewayTech pairs with an SLS-50 Intelligent Stabilized Light Source to identify fiber, measure attenuation and loss, verify continuity and evaluate fiber link transmission quality. Compatible with FTTx testing, the OPM-50 can be applied to measure triple-play signals (1310nm, 1490nm and 1550nm) on a Passive Optical Network (PON). Actual applicable wavelengths based on light source configuration. Features: Automatic wavelength identification when paired with SLS-50 Remote reference value setting FTTx applicable Internal clock & fiber S/N editable Memory of 1000 test records Data transfer to PC via USB USB power charging No warm-up, quick start Backlight 70 hours continuous operation Pocketsize, lighweight and easy-to-use CE FCC certificates Specifications: Optical Power Meter Specifications Calibrated Wavelengths 850, 1300, 1310, 1490, 1550, 1625nm Power Range (dBm) OPM50A: -70 ~ +10dBm OPM50B: -50 ~ +27dBm Fiber Type Singlemode / Multimode Detector Type InGaAs Accuracy OPM50A: ±5% ±0.01nW(±0.5dB@850nm) OPM50B: ±5% ±1nW(±0.5dB@850nm) Resolution (dB) 0.01 MOD Identification 270, 1K, 2K Hz Auto Wavelength Identification Yes (With SLS-50) Display Unit W / mW / µW / nW / pW / dBm / dB(REF) Data Storage 1000 records Connectivity USB Connector FC (Interchangeable SC/ST) Power Supply Lithium Battery / AC Adapter Battery Life Continuous operation: 70 hours Power Saving Auto-off after 5 minutes idle General Operating Condition 0°C ~ 50°C; (32°F ~ 122°F) Storage Condition -20°C ~ 70°C; (-4°F ~ 158°F) Humidity 0 ~ 95% (Non-condensing) Dimensions 6.97 x 3.15 x 1.73 inches; (177 x 80 x 44mm) Weight 0.69 lbs; (315g) User manual:http://www.shinewaytech.com/admin/up/1511918138.pdf