Up to 52 hours of playback time: Up to 52 hours of listening time in Bluetooth mode, you will always have music that Inspire you. You can take advantage of the comfort of the wireless headphones or the lasting properties of a cable connection (3.5 mm audio cable included), the Doqaus Care 1 headphones have the two options. Sound quality optimized with 3-EQ modes : Doqaus is always updated to achieve better sound effects and a better auditory experience. A great step that Doqaus has given: Wireless headphones with DOQAUS CARE 1 OVER EAR Bluetooth microphone have 3 equalization modes, which can freely change between balanced sounds, amplified with bass and high resolution.