About this item BONE CONDUCTION TECHNOLOGY FOR SAFETY - Distinct from the tradition earbuds, allow user enjoy music with ears open so can be aware to the surrounding sounds while exercising - running, hiking, biking, etc. Also better for the ear drums than the regular in-ear or on-ear headsets. DESIGN FOR COMFORT - Ergonomic wearing and anti-drop design, lightweight weight less than 1.5 oz with flexible material, easy to fit into hand bags or pockets, perfect use for both indoor & outdoor activities. MADE FOR DURABILITY - High quality material, 8G memory in MP3 mode, sweat proof and also rain/spay waterproof. 160 mah rechargeable lithium battery provides 6 hours music playtime, only 2 hours of fast charging, plus 10 days standby. BLUETOOTH WIRELESS - HiFi music streaming from your smart phones, iPads, or tablets, with double noise reduction features high sensitivity microphone build-in for clear quality phone calls.