Features: 【Integrated Design】Combines an opt power meter with a red light source into a single unit, facilitating portability and ease of use for testing requirements. 【Precise Measurement】Delivers accurate opt power measurements, ensuring reliabled testing results. 【Multi-Function Display】Features an LCD screen displaying real-time power values, and battery display for straightforward operating and clear data readability. 【Robust Construction】Housed in durability aluminum , it offering shock resistance, making it suitable for demanding environments. 【Long-Lasting Battery】Features a built-in rechargeable battery supporting extended continuous operating, eliminating the hassle of frequent replacements. Specifications: Component: aluminum alloy, Size: 17x2.5cm. Weight: 125g. Specifications: FWV-05C V30/20 Optional Red light power: 20mW, 30mW. Opt power meter ranges: -50-30dB. Display ranges: T type: -70~+10dBm / C type: -50~+30dBm. Accuracyx: ±0.2dB (1310/1550nm); ±0.30dB (/980/1300/1490/1625/1650nm); ±1dB (1270/1577nm). Display accuracy: 0.01dBm. Opt interfaces: 2.5mm Package Includes: 1PC Opt power meter 1PC charging cable 1PC 7mm ceramic cored note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.