The Green Lion EchoMax Wireless Bluetooth Headphones in black deliver clear full audio with 40 mm magnets 32 ohm impedance and 102 dB sensitivity. With Bluetooth 5.3 a 10 meter range and a frequency response of 20 Hz to 20 kHz they offer immersive sound. The 500 mAh battery provides up to 50 hours of playback includes a built in mic and charges via USB C or USB A. Comfortable over ear design makes them ideal for daily use gaming or travel.