Features:1, Lightweight without burden, single one is just 4.6g, which is weight as a A4 paper, it will reduce your ear burden, and wear more softly.2, Lower energy consumption3, Signal strength up to 20m4, wireless free mode, with pretty appearance5, 100 hours plus endurance abilityEasy Automatic Pairing: Make truly one-step pairing possible. Just by taking out the earphone from the charging case, earbuds will automatically turn on and enter into pairing mode .Once paired for the first time, you will no longer have to worry about pressing any button to turn them off/on, they are smart so they know when to turn on / off.Size: 22.53x22.53x16.8mmPacking list: earphone, carrying box