*2-in-1 Headphones: works wireless with all smartphones, tablets, or other devices equipped with Bluetooth function *Headphones to listen to music wireless via Bluetooth 5.0 or wired with the audio cable *Kids safe! 85 dB max volume to protect children ears *Can answer calls. With microphone and control buttons (play/pause and volume adjustment) *Foldable! Very light, to fit easily inside a bag *Adjustable to fit all heads *Up to 12 hours of playing time in wireless mode and unlimited use in wired mode *High capacity rechargeable battery. Rechargeable via USB-C port (cable included)