Dedicated to smartphones, tablets, notebooks Compatible with Bluetooth 5.0 control via smartphone or buttons on the headphones modes: bluetooth, AUX, call very high quality converters provide crystal-clear sound 3 buttons aluminum construction frequency Response: 20Hz-20kHz impedance of 32 sensitivity: 105 3dB / 1mW (at 1kHz) 200mAh rechargeable battery (recharged with the micro USB) Speaker diameter: 40mm micro USB connector (used for charging) POWER switch surface covered with rubber built-in notification LEDs built-in microphone (function call when connected to the phone via bluetooth) AUX (after the exhaustion of the battery possibility to listen through the included cable 3.5mm mini jack) The USB cable (M) -> micro USB (M)