OTT. Headphones - Magnetic headphones made of PC. BT 4.1 transmission, up to 3 hours of autonomy. The headphones have the function of answering calls, adjusting the volume and connecting to the playlist on your mobile device. USB/micro USB charging cable included. Supplied in an EVA case - Magnetic headphones made of PC. 4'1 BT transmission, up to 3 hours of autonomy. The headphones have the function of answering calls, adjusting the volume and connecting to the playlist on your mobile device. USB/micro USB charging cable included. Supplied in an EVA case. 80 x 65 x 32 mm