Bluetooth Headphones, Wireless Bluetooth 4.0 Earphones Sweatproof Stereo Headset In-Ear Noise Reduction Headphone Earbuds with Microphone Lightweight for Sports Running Smartphones MUSIC & CALLs CONTROL: Wireless Bluetooth Earphones allow auto switching between music and calls. You can control all functions of music and calls easily via the button of Bluetooth headphone. Built-in microphone enables taking hands-free calls while listening to radio. SPECIAL DESIGNS: Ergonomic in-ear design that's lightweight and comfortable for all-day use, will not interfere your excerise and can prevent from falling off the ears when sports. Sweatproof ensures this headset is comfortable and secure for use by cyclists, runners, joggers, commuters and walkers or even relaxing at home. MULTI-POINT CONNECTION: Advanced bluetooth version 4.0+EDR system. 10 meter connection range. Simultaneous connection of two mobile phones, one headset, a key to answer the call. That means that you can seamlessly switch phones between business and personal, never miss any important calls. HD STEREO & NOISE CANCELLATION: Adopted CVC 6.0 NOISE CANCELLATION technology, superior sound isolation, efficiently reduces external noises, guarantees HD stereo sound quality and provides steady Bluetooth signal and support stereo APT-X lossless music. LONG-LASTING USAGE: The rechargeable lithium-ion battery provides up to 4.5 hours talking time / playing music time, 175 hours standby time, only 2 hours charging time, so you have less time charging and more time doing. Support IOS POWER DISPLAY, perfect whether you're pure athletic or just techy - it works for men, women, and kids alike!