Quick Fast Charge 3.0 Charging Block: The fast charge 3.0 USB port adopt Fast Charge technology like other Samsung fast charger. It can provide up to 18W to ensure charge speeds up to 4 times faster than traditional chargers. They are great replacements of your Samsung original OEM fast charging wall charger adapter! Ultra Slim Flat USB Wall Plug: Costyle extra slim wall chargers are especially designed for compact space in your house! You can plug them behind your headboards, nightstands, side tables or any furniture. They are only about 0.6 inch thick and have foldable plug, which make it more portable for worldwide travel or business.