Bass Boost for unique sound, sophisticated wearing comfort and intuitive operation! - Folding ear cups allow the headphones to be stowed away to save space - Additional bass amplification, can be switched on and off with a small button on the ear cup - Thanks to the integrated microphone you can easily switch between music playback and call answer - Pleasantly soft ear pads ensure best wearing comfort - Works with Siri and Google Assistant - Allows the headphones to be connected to multiple Bluetooth devices simultaneously - Closed, circumaural design blocks out ambient noise The headphones are equipped with an individually adjustable headband which adapts to the shape of your head Includes 1 x Bluetooth headphones "Spirit Calypso" 1 x USB/micro USB charging cable(15 cm) 1x quick start guide 1x safety instructions