Usage Tips:2 USB charges 3 outlet, great for charging computer and phones, very handy. Made of flame-resisting materials, fire-proof and high temperature resistant. Elegant pop up sockets great for various environments such as kitchen, work desk, office, etc. Pop up electrical plug socket clever design hidden under when you do not need it instead of mess wires and plugs,keep clean and save a place. Easy to install, just drill a diameter 80mm hole, remove the ring from the bottom, slide the cord and outlet in from the top, slide the ring up from the bottom and screw it tight. Specifications: Rated current: 13A Rated voltage: 250V Rated power: Max.2500W. Top Diameter: 100mm Hole Cut Out: 80-85mm Socket Type: 3 x UK Plug Mains Sockets, 2 x USB Charge Sockets (1000mA 5V) Cable Length: 1.9 Metres How to use: Drill a hole about 80mm diameter,put the unite into the hole. After you install,the item appears to be 3 silver disks.To open the power receptacle, one pushes the middle (medium sized) disk down, which is spring-loaded. That in turn exposes the center (small) disk, which is a handle used to pull the receptacle up and out of the desk.As it pulls up, the USB ports are exposed first, and then the three 3-pronged power outlets. Package Included: 1 x Pop Up Power Socket