Double-Sided Head Mounted Noise Cancelling Bluetooth [USB dongle plug and play] This Bluetooth headset with microphone provides two connection options: Bluetooth V5.0 and USB dongle, allowing you to choose according to actual needs. The wireless range is up to 33 feet/10 meters, and there is less transmission delay when talking. The 40mm audio driver of the computer headset provides high-definition sound quality and world-class speakers, please enjoy your music time and clear calls. [Convenient Charging and Storage] The Bluetooth headset with microphone contains Type-c charging cable and charging base. After a full charge of 3 hours, it can provide up to 45 hours of clear talk time and 200 hours of standby time. After using the Bluetooth headset, just place it on the base to charge, say goodbye to tangled wires and connection restrictions, and keep your workspace tidy. [All-Day Comfort] This USB wireless headset can rotate the microphone up to 270°, can be used on the right or left side, and comes with soft leatherette ear pads and an adjustable headband. Color: Black Material: plastic Package Contents: 1 * Wireless Headset 1 * USB Dongle 1 * Charging Cable 1 * English instruction manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.