Features: Compatibility: This charger compatible with Bose Frames Alto S/M, Alto M/L, Frames Rondo, Frames Soprano, Frames Tenor Audio Sunglasses. Durable & Premium: The Frames Alto charging cable is made of copper wire and durable plastic, and the case is made of aluminum alloy. a full charge takes about 2.5 hours, works like the OEM charger. It is a good choice to replace lost or damaged charging cable. Safe Protection: The Frames Rondo charger build-in smart chips, provides a stable charging performance, protecting watch from over-current, over-voltage or short-circuit. Convenience: To get a charge, just plug into USB port on your PC, laptop, notebook, wall charger or car charger. very convenient to charge your audio glasses at home, in office, in car or on travel. Package includes: 2 x 2.7ft/80cm charging cable for Frames Alto/Rondo/Soprano/Tenor (Audio glasses is not included) Compatible Device: Compatible with Frames Alto S/M Compatible with Frames Alto M/L Compatible with Frames Rondo Compatible with Frames Soprano Compatible with Frames Tenor Specification: Wire: pure copper Input: 5V/1A Cable Length: 80cm/2.7ft Package included: 2 x charging cable for Frames Alto/Rondo/Soprano/Tenor (Audio glasses is not included)