Main Features: Double earplugs design Light weight and portable， easy to carry In ear style， very convenient when driving and doing sports Come with S/M/L different sizes of earbuds for more comfortable wear Multi-point pairing， can connect with two phones at the same time Wind noise reduction to improve the quality of conversations Advanced technology， provides perfect sound quality Volume control and song switch function Allows you to answer the call and listen to stereo music anytime and anywhere Suitable for all Bluetooth enabled device .Features: 100% brand new and good qualit Stylish in-ear design， more comfortable Sweat-proof: prevent sweat and rain from interfering headset operation Built-in microphone， answer/reject calls conveniently Wind noise reduction， excellent sound clarity Built-in rechargeable battery and will come with an USB cable for charging Support system: Android， IOS， Windows Connection Type: Bluetooth V4.1 Bluetooth profiles: A2DP/AVRCP/HSP/HFP Frequency range: 2.4GHz-2.48GHz Frequency response: 20Hz-20 KHz Operating distance: up to 10 meters Operation temperature: -10°C to 50 °C (-15°F to 122 °F) Standby time: up to 180 hrs Talk/Music time: up to 5 hrs Charging time: about 2 hrs Package inculed : 1 x Earphone， 1 x USB Cable， 1 x User Manual Keeping in touch when necessary. Have a nice day ! Best regards