ITEM NAME:Bluetooth Bone Conduction Headphones Wireless Earphone Headset Mic Black Description: Not in the ear, painless to wear, hanging-ear comfortably worn. Earphone conforms to the ear, and the ear is evenly distributde, giving you a more comfortable wearing experience. Use professional audio decoding technology to reduce loss in voice transmission. No earplug design, full use of ergonomics, hidden and comfortable. When exercising, the earphones are waterproof and sweat resistant. Specification: Material: ABS Size: Approx. 71*38*6 mm/2.80*1.50*0.24 inch Version: V4.1 Transmission Distance: 10 m Battery Capacity: 90mAh Li-ion battery Standby Time: 160 hours Play Time: about 6 hours Charging Time: about 2 hour Impedance: 32Ohm Sensitivity: 95dB Sound Channel: Two-channel (stereo) Package Includes: 1 Piece Bone Conduction Earphone 1 Piece Cable 1 Piece User Manual SKU: ALU0006346768012598.No earplug design, full use of ergonomics, hidden and comfortable. 1 Piece Bone Conduction Earphone. Earphone conforms to the ear, and the ear is evenly distributde, giving you a more comfortable wearing experience.