Astro A20 Wireless Headset

Microphone: uni-directional (6 mm x 2,7 mm) Ear coupling: over ear Drivers: 40 mm Neodymium Wireless range: 15 m / 49 ft Wireless frequency: 2.4 GHz Battery type: rechargeable Lithium-Polymer Battery charging time: 3,5 hours (15 degree C - 40 degree C) USB connection type: USB 2.0 High Speed over USB-C