● HD Audio Codecs: AAC/SBC ● Dynamic driver: 13mm ● Battery Life (Charging case): 20 hours ● Battery life (earbuds): 3.5 hours of calling ● Playback: 4 hours ● Can fully charge earphones for up to 4 times ● Battery capacity (case): 380mAh . Warranty : 3 Months Brand Warranty (One time replacement in whole warranty period)