Specifications:Bluetooth version: V3Bluetooth mode: Hand Free/Headset/AV/AV RCP profileRadio frequency: 2.4GHzTransmission power: class2The transmission range: 10 metersThe charger power supply: AC input DC output 5V 110-240VMusic time: approx. 3 hoursTalk time: approx. 4 hoursStandby time: approx. 120 hours Size: approx. 2.7*1.5*1.2cmColor: Black，White，Pink，Beige，BluePackage includes:1 * Mini Bluetooth Earphone1 * USB cable (Without charger)Compact， ultra Light Design Stereo Bluetooth Headset， Portable And Easy To Carry.High-fidelity sound quality， Wireless songs enjoyVoice report number， low power remind，Connect/disconnect remind，Boot off prompts.Allows you to conveniently answer calls while driving.No matter where you are， on the road， in the office， or driving the car， as long as you carrying it， you can always keep in touch.Uses DSP technology， completely contraption and fashion.Supports Two Mobile Phones Simultaneously Connected.Long battery life， fast charging.