The charging case is equipped with a 380mAh battery, which is charged via a USB-C cable. With the charging box, it offers a total playback time of up to 30 hours. The headphones themselves offer up to 8 hours of listening time and 5 hours of calling. The headphones have a quick charge function, put the headphones in the charging box and within 5 minutes they charge for another hour of listening to music. The 7.2mm driver delivers HIFI sound that combines powerful bass and dynamic transient analysis power. Each headset can work independently, just switch to mono/stereo mode. Specifications: AAC/SBC HD audio codec Phone capacity: 50 mAh Charging box capacity: 380 mAh Playback: 7.2 mm dynamic driver Frequency: 2400 ~ 2483.5 MHz ENC noise reduction technology, 4 Bluetooth microphone reduction: V5.1 Bluetooth range: 10 m Software: AAV, SBC Smart EQ EQ CertificIPX5Playtime up to 8 hours Playing time with box up to 30 hours USB-C charging cable Package Included: Charging Box Headphone USB-C Cable 2 extra pairs of silicone tips