Ergonomic ear-piercing design, tightly fitting the ear canal to provide a more comfortable wearing experience. Feel free to wear with one or both ears. The two headphones can connect to a device at the same time, share music with a person, or enjoy dual ear surround sound alone. It can also be used separately, the equivalent of two BT headsets.Features:Ergonomic ear-piercing design, tightly fitting the ear canal to provide a more comfortable wearing experience.Feel free to wear with one or both ears.The charging compartment can be charged by USB interface.The two headphones can connect to a device at the same time, share music with a person, or enjoy dual ear surround sound alone.It can also be used separately, the equivalent of two BT headsets.Magnetic charge, put the earphone into the charging box to charge.Adopt simple one-key operation mode, convenient and fast.Specifications:Item type: EarphoneColor: White, black(optional)BT Version: 5.0Power input: DC 5V Battery capacity: Headset: 3.7V, 45mAh                           Charging cradle: 3.7V, 450mAh  Supports: A2DP/HFP/HSP/AVRCPReceive sensitivity: -92dBmWorking temperature: -10~50℃Main material: ABSDouble channel support: call/musicPackage weight: 147.7g / 5.2ouncesPackage size: 0.12 * 0.09 * 0.038m / 4.72 * 3.54 * 1.49inchPackage list:1 * Pair of earphones1 * USB Cable4 * Earplugs