Features: Measures 8 standard wavelengths: 850/980/1300/1310/1490/1550/1625/1650nm with a test range of -70dBm to +6dBm. Compatible with FC/SC/ST universal interfaces and RJ45 testing, displaying both linear mW and non-linear index dBm simultaneously. Wavelength memory function saves the last set test wavelength before shutdown. Includes a backlight and auto shutdown functions for energy efficiency. Features LED lighting for convenient wire inspection in dark environments. Durable protective housing minimizes damage from collisions. Compact size, making it easy to carry anywhere. Specifications: Material: Plastic Color: Orange Standard Wavelengths: 850/980/1300/1310/1490/1550/1625/1650nm Test Range: -70dBm to +6dBm Auto Shutdown Time: 10 minutes Working Time: Up to 72 hours Power Supply: 2 AAA batteries (not included) Working Temperature: -10°C to +60°C Storage Temperature: -30°C to +70°C Item Dimensions: 112 x 66 x 30mm (4.41 x 2.6 x 1.18 inches) Package Dimensions: 112 x 66 x 30mm (4.41 x 2.6 x 1.18 inches) Package Weight: 150g (5.29 ounces) Note: The actual color of the item might slightly differ from the images due to differences in display screens and lighting effects. Please allow minor measurement deviations due to manual measurement. The network test remote tool shown in the images is not included in the product. Package List: 1 x Cable Tester 1 x Black String 1 x User Manual