Boombasstic sound: non-stop wireless music enjoyment - with or without bass amplification - from hiphop to pop to rock. So that the beat vibrates through the body: wireless headphones with additional bass amplification, can be switched on and off depending on the music style on the multi-function button. Sound rich: Whether music, podcast or audiobook – with 60 hours of battery life, the over-ear headphones never run out of beat on the go. Casual change: favorite playlist on phone, audiobook on tablet, conversations on business smartphone - Multipoint allows you to connect the headphones to two Bluetooth devices simultaneously. Box contents: 1 Spirit Calypso III Bluetooth headphones, 1 quick start guide, 1 safety instructions (English language not guaranteed)