Bed Risers with built-in plugs and USB ports are a must-have for the dorm or home. Set comes with a 6 ft. long electrical cord to plug into the nearest wall outlet. Now your cell phones, tablets and laptops can be within easy reach as they charge. The 7” height of the risers also adds under-the-bed storage space. Only one bed riser contains the 2 grounded electrical plugs and 2 USB ports. Set of 4.