This is an adapter that allows you to add one more outlet (up to 400W) to a 2-pin figure-8 power cable. This is a set of 2. It is currently discontinued and difficult to obtain. Your laptop AC adapter quickly becomes a power strip! By connecting it to a laptop AC adapter, you can use it as a power strip: "AC adapter tap (2P type, 1 outlet)" Manufacturer: ELECOM Rated: 125V, 7A (Max 400W) Size: Width 40 x Depth 22 x Height 52mm Weight: 30g ◆ Product Overview https://www.elecom.co.jp/products/T-ACTAP21.html - Brand: ELECOM - Color: Black - Type: Connector - Shape: Square - Number of terminals: 2 - Application: Connecting PC peripherals - Let's Note AC adapter