COULAX Magnetic Bluetooth V4.1 Headphones Wireless Stereo Earbuds with Hands-free Calls, In-Ear Headset for iPhone and Android Unique Magnetic Design: This lightweight headset can wrap around and hang like a necklace. It's unique design allows you to wear it during daily activities without the worry of loss. Connecting the earpieces together will stop playing the music or disconnect the call Noise Cancelling and Clear Voice Capture Technology: CVC 6.0 inhibits background noise while maintaining the crystal quality sound and deep bass for your music. Built-in mic supports Siri voice control to answer/reject calls(Apple devices) Dual pairing: Bluetooth headphone allows pairing with two mobile devices simultaneously. You can answer your business or personal phone with ease. Top-notch Warranty of COULAX provides a 12-month worry-free warranty Excellent battery performance: A built-in 120mAh lithium-ion polymer battery boasts 160 hours of stand-by operation or 8 hours of play/talk time. Businesses use benefit from this extended battery performance Advanced Bluetooth Technology: the latest Bluetooth V4.1 headphones compatible with 99% of all Bluetooth capable devices. A strong signal eliminates connectivity issues within 30 feets device