Comprehensive Testing Tool: The Optical Power Meter is designed for professionals in the telecommunications and networking sectors for testing light attenuation and identifying faults in fiber optics Portable and User-Friendly: This mini-sized, device is not only easy to carry but also simple to use, making it an ideal choice for fieldwork Its compact design does not compromise on functionality, offering accurate readings and reliable performance It's perfect for maintaining a wide range of optical networks Tips:The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Color:Black Material:ABS Package Contents: 1 * Optical Power Meter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.