Features: When you click on it and it will light up.Perfect for any mechanical keyboard lover. The exterior is designed with a lovely shape, which is unique and for creative, and easy to use at the same for time. This switch tester base is a stress relief gift. It is the first choice for customized lovers. This keyboard switch tester is made of high qualiity ABS material, durable When you add switches and keycaps, the switch tester provide a more accurate testing environment and truer feeling.<br/ Specifications: Item Name: Switch Tester Base Type: Backlit Keychain Color: Black Material:ABS Quantity: 1PC LED light color: RGB Dimension：approx1.8x1.8x2.6cm/0.71x0.71x1.02in Battery: Button battery (Included) Package Includes: 1 Piece Switch Tester Toy note: Without retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!