Unique Features: While other headset stands only offer a place to store your headphones, the COZOO Headset Stand is equipped with 1 USB 3.0 ports and 2 USB 2.0 ports, providing easy access to your USB peripherals. The included 3.5mm port also provides a convenient port to plug your headphones in.Mounting tips: 1.Clean and dry the surface of the desk and the stand before installing. 2.We recommend you wait 24 hours to make the adhesive fully secure so that there is enough adhesive force between the desk and the headphone stand. 3.If hanging weight more than 500g . please install the screws. 4.This adhesive is very sticky with good quality in order to mount steady . If you can't take the adhesive cover off , You can use the hair dryer to heat it and tear it down.Specifications: Material: Fireproof ABS+PC Cable Length: 5ft / 1.5m Overall Dimensions: 5.1 × 4 × 2.4 inchs / 130 x 102 x 60 mm Headband Plate Dimensions: 2 × 1.2 inchs / 50 x 30 mm each screw Dimensions: ?0.16 × 0.6 inch / ?4 × 15 mm Weight: 5.8oz / 165 gPlease Note: The USB ports on the stand function as a USB hub only, to connect USB 3.0, 2.0, USB 1.1 devices to your computer, and is not a standalone device charger. Headphones are not included. If you would like to buy under desk headphone hanger with USB charger, please refer to this product: www.amazon.com/dp/B0719R8L6S This item is a USB bus powered hub and with 1.5m data cable connection., It results in more consumed power, which may not have enough power to read external HDD. It is recommended to use the computer interface to read & write the external mobile hard disk.