Sweatproof Handfree Wireless Bluetooth Sports Stereo Headphone Earphone Handset Feature:It is compatible with all Bluetooth compliant devices such as mobile phones and music players.Bluetooth anytime and anywhere without bothering from a mess of cable.Good as jogging headphone， running headphone， gym heaphone and all sports headphone. A small and lightweight designBuilt-in rechargeable lithium battery， charge directly from USB portBuilt-in Microphone， answer to the phone calls when paired with mobile phoneSweatproof，You don't have to worry about the sweat will get wet your headset.Multipoint connection，connect two mobile phones at the same time. Specification:Color:Black+Yellow，White+GreenBluetooth version:4.0Power source:Built-in Li-ion Battery(USB Charging)Working time:Up to 4 HoursBluetooth profiles: A2DP， AVRCP， HSP， HFP，APTXCable Length:56cmPackage Size:20x15x4cm (approx) Package include1x Bluetooth Headphone1xUSB Charge Cable1xUser Manual4xSilicone Ear Hook6xSilicone Cover More detail: