Foldable wireless headphones made of wheat straw fibre and ABS. They work with BT v5.0 transmission, have a micro SD card reader and a 3.5mm AUX jack, which allows the headphones to be used via audio cable, even when the battery is flat. The battery has a capacity of 400 mAh and can last for approximately 4 hours. The built-in microphone and buttons on the headphones allow you to answer calls, control the volume and playlist on your mobile device. Includes a USB charging cable and a 3.5mm audio cable. Supplied in a pouch in a kraft paper box