1. Cleaning times: 500 times 2. Cleaning effect: -20 to -50dB (return loss) 3. Applicable dust-free level: CLASS10000 4. Suitable for cleaning the ferrule end face of optical fiber connectors such as FC/SC/LC/ST/MU/D4/DIN. 5. Using high-density alcohol-free special ultra-fine textile fiber, the cleaning effect is fast and effective 6. Manual operation, lightweight design, replaceable belt core 7. Dimensions: 115x50x28mm 8. Weight: 100g