Single In-ear Wireless Earbud Bluetooth 4.1 Chip Built-in Microphone, Noise Reduction Function, Multifunctional Button Ergonomic Comfortable Design, Compatible with Bluetooth-enabled Devices Feature： 1. Built-in microphone. One button to answer/ hang up a call. Supports voice prompt and number report when phone call is coming. 2. Wireless music streaming supported, 6 hours music time per charge. 3. Single multifunctional button, Built-in microphone, 5 hours talk time per charge, 2 hours charge time, USB charging cable included. 4. Invisible, smallest and ultra light design. Get free from wire binding up, bring more convenience when working out, doing sports and other activities. Get rid of the trouble wire bring. 5. Bluetooth V4.1 smart chip, efficient and stable data transmission. Compatible with any bluetooth-enabled devices such as mobile phones, Tablets PC and more. Specification Model: YX01 Product Name：Mini Wireless Bluetooth Earphone Bluetooth version: 4.1 Call duration: 5 hours Music length: 6 hours Charging time: 2 hours Standby time is about 100 hours Effective distance: 10M Battery capacity: 60MA Voltage: 3.7V Charging voltage: DC5V 150mAh Working current: 25-35mA Bluetooth A2DP Working range: 10m Output power: 35mW Frequency range: 2.401-2.480GHz Distortion factor: ≤1% Frequency response: 20Hz-20KHz Net weight:60g Size:15*15*5cm Color:Black/White/Brown/Blue/Pink Wearing styles:Ear / Stealth headphones patented product Compatible Phone: Compatible with for Android, for iOS, compatible with Microsoft, tablet, 99% of the phone with Bluetooth. Packet included: 1PC Bluetooth Headset 1PC USB Charging Cable Kiplyki Single In-ear Wireless Earbud Bluetooth 4.1 Chip Built-in Microphone, Noise Reduction Function, Multifunctional Button Ergonomic Comfortable Design 2. Wireless music streaming supported, 6 hours music time per charge. 3. Single multifunctional button, Built-in microphone, 5 hours talk time per charge, 2 hours charge time, USB charging cable included. 4. Invisible, smallest and ultra light design. Get free from wire binding up, bring more convenience when working out, doing sports and other activities. Get rid of the trouble wire bring. 5. Bluetooth V4.1 smart chip, efficient and stable data transmission. Compatible with any bluetooth-enabled devices such as mobile phones, Tablets PC and more. Specification