e-TKT Mini Bluetooth Earbud, Single Wireless Earbud, Hands Free Bluetooth Headset Invisible Sport Headphone with Mic, Bluetooth Earpiece Earphone for iPhone Samsung Android (1 Pcs)(Black) ENHANCED BATTERY: Built-in 60mAh rechargeable lithium battery, up to 5-6 hours music time and 120 hours standby time,1.5 hours charging time, support battery power display on your phone, WEARING COMFORTABLE: Ergonomically designed to perfectly fit your ear, (left or right), only 3.5g, very comfortable to wear, snug and secure, will not cause ear swelling., HIGH QUALITY: Bluetooth 4.1 audio decode technology, provides pure, high quality sound for compatible devices. CALL CLEAR: CVC 6.0 noise reduction, Built-in high definition microphone brings smooth communication. You can make phone calls when you are driving without violating traffic rules and safely. GREAT COMPATIBILITY: Compatible with all Bluetooth-enabled devices. Instantly connected to your smartphone or tablet from up to 33 feet away.