Check the listing for details. Portable Lightweight Optical Meter High Accurancy Rechargeable Optic B1F4. Condition: New. Listed at 15.03 USD. Mini optical meter has compact structure and stable performances. It ensures high measuring accurancy of 850nm, 980nm, 1300nm, 1310nm, 1490nm, 1550nm and 1625nm wavelengths. Combined usage with Optical--Source, it could accurately measure the loss of fifiber, cable and other passive optical devices. Features: Light weight and mini size for easy carrying. ABS material, comfortable feeling. Highly sensitive detector, fine stability, accurate measurement. Self calibration by user himself. Large rechargeable lithium supports continuous work for up long hours. function, convenient for dark environment operation. LCD color screen, ultra-low energy consumption, clear display does not hurt the eyes. Automatically save the last tested wavelength when shutting down. 40 sets of data are automatically covered and stored in cycles. USB : universal interface, plug and use. Specifications: Model: G1000, G1050, G1010 (optional) Measuring : G1000: -70+3 G1050: -50+26 G1010: -70+10 meter interface: 2.5mm SC// Calibration wavelength: 850nm, 980nm, 1300nm, 1310nm, 1490nm, 1550nm, 1625nm Automatic shutdown : 10min Resolution: 0.01dB : 3.7V, 400mAh Item size: 125 * 34 * 17mm / 4.9 * 1.3 * 0.7in Item weight: 52g / 1.8ounce Package size: 148 * 53 * 35mm / 5.8 * 2.1 * 1.4in Package weight: 120g / 4.2ounce Packing List: 1 * Optical Meter