[2 Prong to 3 Prong Power Strip]-This product can convert a polarized 2 prong outlet to a 3 prong outlet, ideal for the non-grounded outlets in you older house. [Space-saving Installation]-There are two 'key holes' and screws on the back of the two prong to three prong outlet adapter, as well as 2 pieces of 3M adhesive, you can freely install your power board wherever you want to install it. [Built-in Comprehensive Protection]-NTONPOWER 2 Prong power strip is made of high strength fire-resistance ABS+PC shell, making it fireproof up to 1382 F. [Two Prong Power Strip with USB Port]-The three prong to two prong adapter with 2 USB ports, The latest USB technology will automatically detect the device and provide the best stable charging current. [180°Rotating Polarized Plug]-The extension cord 2 prong with rotating plug easily fits in tight spaces like behind couch, dresser, wardrobe, bookshelves or other furniture which is clos