Need more than 1? Choose the number of sets in the dropdown to receive a bulk buy discount up to 20% offFeatures:Comfort Wearing - Be Free To Choose Exchange Your Left And Right Ear Wearing, With Glasses Do Not Affect The Wear. Compatible For Ios, For Android, For Wp System, As Long As The Devices Have Bluetooth, It Can Be Used.Bluetooth 4.2 Bone Conduction HeadphoneSingle Ear Hook Type Headphones - Small And Covert, More Comfortable. Is Very Light, Painless Wearing In Long Time Use, Latest Concept Ergonomics Design Fully Fit Outside The Auricle.Clear Call And High Qulity - Built-In High-Performance Lithium Battery, 5-6 Hours Continuous Play, 5-6Hours Continuous Call, 1-2Hours Fast Charge.Speaker Unit Is External - Loudspeaker Close To The Ear But It Is Not Inside The Ear. It Will Help Listens To The Surroundings At The Same Time, Let You Keep Safety For Biking, Running, Driving And More Portable For Business, Work.SpecificationDimensions And WeightProduct Weight: 0.0080 KgPackage Weight: 0.3000 KgProduct Size (L X W X H): 7.30 X 4.00 X 1.10 Cm / 2.87 X 1.57 X 0.43 InchesPackage Size (L X W X H): 9.00 X 6.00 X 2.00 Cm / 3.54 X 2.36 X 0.79 Inches You Will ReceiveYou Will Receive: 1 X Bone Conduction Headphone, 1 X Usb Cable