Headband headphones bluetooth headphones type of fitting on ear transmission modes cordless wired and wireless features gold plated jacks headset compatible with ios function rechargeable music functions next track pause play volume previous track call functions answer call end call bluetooth sensitivity 110 dbmw impedance 40 ohm frequency response 20 20000 hz driver 40 mm number of drivers 1 operating time 10 h length of cable 1 m types