Features:Fashionable Single-Ear design，Ultra Comfort Earpiece ， much more fashionableand personality.Connection Type: Bluetooth V2.1Built-in BatteryVolume control: Volume up/Volume downWorking Distance: about 3 MetersCompatible with most bluetooth enabled device，such as cell phones， smart phones or laptop/pc which have bluetooth function.Surpport System :Windows 98/2000/XP/Vista/win7DescriptionsBluetooth Version: V2.1+EDRFrequency range: 2.4GHz--2.48GhzCharging:0--45Operation voltage:3.6VFile Format: Headset and hands-free formatChannel: MonoTalking time: ��2HStandby time: 60 hoursStandby current: ��1mColor:blackHeadset size:48*16mmCable length:520mmWeight:20 gPackage weight:30 gPackage Included:1 x Bluetooth Mono Earphone W/MIC1 x usb cable��DO NOT INCLUDE CHARGER��