Features: Experience stress relief with this 9 key mechanical switches tester featuring led illuminating keycaps. Transparently PC housing, and tactiled feedbacks that genuine mechanical keyboards. With individual LED lights provide visual confirmation for each press, combining durability construction with interactived silicone portability for daily carry. Ideal for keyboard enthusiasts switches testing tools, office workers needing tension release, and students pursuing enhancement through repetitive motion therapy. Perfect for desk accessories during work breaks, home relaxation to alleviate anxiety while serving as functional keycap decoration. Specifications: Material: PC Featuring Led Color illuminating Size: about 5.8x5.8x2.8cm/2.28x2.28x1.1in Color: Optional Package Includes: 1PC 9-Key Switches Tester note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.