The advantages of Pop Up Desk Power Outlet
1. Easy to Install: Make a hole about 2.4" (6cm) diameter on desk surface, insert into the hole, screw tight the ring, please note the height of the table to the ground needs 13 inches (33cm) at least.
2. Convenient & Compact: When the pop up power outlet in need, can press the center button, and then pull up the hidden parts under the desk. When not in use, just push down the product, and keep the top of power strip flush with the desktop.
3. Best Quality: High-quality aluminum housing + plastic material. Suitable for indoor use, like home, hotel, office, restaurant, kitchens, meeting room, conference counter, desk, table etc.
See more at below link：
https://www.hkram.com/desk-power-outlet/pop-up-usb-outlet/pop-up-desk-power-outlet.html