BT 4.2 Stereo Earphone Headset Wireless Magnetic In-Ear Earbuds Headphone Magnetic Wireless Bluetooth Earphone Headset Sports Stereo Headphone Earbuds Hands-free with Mic Features: Light weight for all day comfortable. Easy use and carrying . Bluetooth 4.2 . high fidelity speaker, excellent call quality. Free call and listen music function. Bluetooth Effective Distance:10 meters Distortion degree: 1%. Recharging voltage: 5 V. Package Weight (kg): 0.06 KG. Build-in rechargeable li-battery. It has a microphone. you can talk to people using the Bluetooth earphone. please check. thanks Specifications: Color: Blue/Black/Silver/Gold Bluetooth version: CSR4.2 Job scope: in 10 meters Standby time: > 180 hours Life time: > 2~3 hours Charging time: 2 hours Frequency response: 20 hz - 20 KHZ Package list: 1 x Bluetooth Earphone 1 x USB Charging Cable 1 x User Manual