No.2 Warehouse Light up Luminescent Visible Current Flow Smart Charge & Sync Cable with Micro USB Port for Samsung S4 S3 N8000 Etc.(pink/blue) + a Piece of Clean Cloth Electroluminescent (EL) technology to see current flow as charging Shuts off power from the source when your device is fully charged reducing the consumption from charging and data sync Compatible with : samsung S4 S3 N8000 etc. Visible current flowing speed indicates the Phone battery level: 1% - 65% FAST; 65% - 99% SLOW; 100% OFF