Features: 1.The world's smallest earphone, not flash while using, super mini and invisible, to completely keep your listening to music become a private thing. 2.Sports version, you can run with music, won't fall even blast exercising. 3.Built in 55mAh large battery, but additionally equipped with 260mah charging box, to back up your earphone for non-stop use, can charge your earphone more than 4 times. 4.Single-piece earphone fits both left and right ear. 5.For DSP deep noise reduction, the sound quality is awesome. specification: 1. The world's smallest earphone, not flash while using, super mini and invisible, to completely keep your listening to music become a private thing. 2. Sports version, you can run with music, won't fall even blast exercising. 3. Built in 55mAh large battery, but additionally equipped with 260mah charging box, to back up your earphone for non-stop use, can charge your earphone more than 4 times. 4. Single-piece earphone fits both left and right ear. 5. For DSP deep noise reduction, the sound quality is awesome. 6. With English voice prompts, caller number prompt. Battery level shown on IOS system. 7. Suitable for driving, business, running and outings. : RF transmit power: 90DB (transmission is more stable) Signal transmission channel: Cassl2 Wearing method: Half In-ear Microphone sensitivity: -42DB back room high-end microphone Transmission range: 10-15m Transmission rate: 24MBPS Talk time: about 6-7 hours Music time: about 6-7 hours Input voltage: DC5V 1A (nax) Charging time: about 1.5 hours Standby time: 150 hours Charging Box: Input voltage: DC5V Input current: 1A Output voltage: 5V/160mA (Max) Output current: 2.1A Battery capacity: 260 mAh(The charging box can charge headset more than 4/5 times.) Color: Black, White, Skin, Red, Rose Gold(optional) Package List: 1 * Headset 1 * Charging Box 1 * Data Cable 1 * Pair of Earphone Caps 1 * Instruction Manual