BASS. Wireless headphones - BASS are wireless headphones with Bluetooth 5.0 transmission. The storage case also serves as a charger (300 mAh), making the BASS headphones practical and easy to take wherever you want. The working time of the headphones is up to 6 hours and the charging time is 2 hours. Supplied in a black gift box with a USB/USB-C charging cable - BASS are wireless headphones with 5'0 Bluetooth transmission. The storage case also serves as a charger (300 mAh), making the BASS headphones practical and easy to take wherever you want. The working time of the headphones is up to 6 hours and the charging time is 2 hours. Supplied in a black gift box with a USB/USB-C charging cable. 68 x 39 x 28 mm