E ECSEM Magnetic Charger cable Compatible with Bose Frames Alto S/M, Bose Frames Alto M/L, Bose Frames Rondo, Bose Frames Soprano, Bose Frames Tenor Audio Sunglasses Product Features: 1, the output short circuit protection 2, over-voltage overload filter protection 3, the use of imported components, real machine test aging and high safety performance 4, anti-jamming performance 5, DC ripple is small, high efficiency, fast charging 6, the working temperature is low, long service life. 7.Standard USB Type A connector offers versatile charging Features: Line with 20 new pure copper wire will not heat to ensure the safety of the user's personal safety. Small and novel, easy to carry, faster transmission, worry and save trouble! Charging Cable Only: Bose Frames are not included with this product Seller Service : All E ECSEM products have been checked one by one before sending to Amazon warehouse, please rest assured and enjoy shopping. if you get a defective item, please contact our email at the first time, we are responsible for all quality-related issues. We will do our best to provide the best pre-sales and after-sales services.