I have used this a few times and have kept it stored at home. It's in very good condition, and all accessories are included. (Earplugs are unused and unopened.) Please see the following, which is quoted from the product description on the shop's website: ■ Enjoy deeper music with smaller vibrations than previous bone conduction earphones. ■ Patented bone conduction technology allows you to keep your ears open, without inserting anything into your ears, and fully aware of your surroundings. ■ Excellent response to mid-high frequencies with less vibration and high volume, and deep bass. ■ Weighing less than 1 ounce (28g), lighter than an egg, for an outstanding wearing experience. Comfortable enough to wear all day without even noticing. ■ IP67 dustproof and waterproof performance Speaker Type: Bone conduction transducer Microphone Type: Dual noise-canceling microphone Bone Conduction Technology: 8th generation PremiumPitch2.0+ technology Bluetooth Version: Bluetooth ver 5.1 Continuous Playback Time: Approximately 8 hours Quick Charge/Charging Time: Equipped, 10 minutes of charging provides approximately 1.5 hours of use / Fully charged in approximately 1.5 hours Standby Time: Approximately 10 days (approximately 240 hours) Frequency Characteristics/Frequency Band (Bluetooth): 20Hz - 20KHz / 2400MHz - 2483.5MHz Sensitivity/Microphone Characteristics: 105±3db / -38db±3db Supported Profiles/Codecs: A2DP, AVRCP, HSP, HFP / SBC Number of Equalizers: 2 (Standard Mode, Vocal Mode) Charging Voltage / Speaker Impedance: 5V±5% / 8.5Ω±20% Wireless Range / Battery Capacity: 10m / 160mAh Warranty Period: 2 years from purchase Body Size: Approximately 107(W) X 45(H) X 130(D)mm Body Weight: Approximately 26g Accessories: Magnetic charging cable (1), carrying case, user guide, warranty card