Two different safe sound volume settings of 85 dB and 95dB. Built-in 500 mAh battery provides up to 24 hours of playback time Fully charged in approximately 2 hours with USB Type-C charging cable. Range of 10 metres. Extendable adjuster for a flexible custom fit for any head shape Lightweight, durable, foldable, flexible and comfortable swivel design while in use. Additional 3.5mm audio cable included.