To order visit our website.. www.sastogadgets.com Features a powerful 13mm driver unit providing immersive sound, crystal-clear highs, and rich audio. Includes a 32Ω impedance configuration to ensure clear, distortion-free sound. Offers up to 4 hours of music playtime or 3 hours of talk time on a single earbud charge. Delivers an impressive combined total playtime of up to 40 hours using the charging case. Utilizes a 25mAh battery for each earbud and a 240mAh battery capacity for the case.