Bluebits Wireless Bluetooth Headphones &ndash; Bluetooth V4.0 Stereo with Memory Flex Neckband Style Earphone Hands-free Calling with Hd Sound for Hands-free Calling Experience Premium Bluetooth Version 4.0 with New CSR Stereo Bluetooth Chip, Which Guarantees High Stable Performance and Excellent Communication Hands-Free Calling with One Touch Control and Easy Bluetooth Connectivity for Easy Pairing with any Bluetooth Device. Talk Time Up to 7 Hours, Standby Time Up to 8 Days with Excellent Performance within 10 meters Range and Only Requiring 2-3 Hours of Charging Time. Great for Busy People On the Go, Whether You are Driving, Working, Exercising, Walking, Running, in the Gym, Sitting, on Foot All Day, or Any Other Activity. Perfect Device to Make Your Life Easier When it comes to Using Your Phone Answer Calls with a Push of a Button, Music will Pause then Resume after Your Call. Complete Control of Music with Skip Track & Volume Control