Description of the Product: Product details: 1. USB wired transmission method 2. There are 108 buttons. Button stroke: approximately 4mm/0.16in; button strength: approximately 60±10g 5. Button life: approximately 50 million times 6. Rated current/voltage: DC 5 v/250 mA 7. Product dimensions: approximately 435 (L) * 123 (W) * 38.5 (H) ± 0.5 mm / 17.13 * 4.84 * 1.52 ± 0.02 in 8. Hand support dimensions: approximately 435 (L) * 68 (W) * 14.5 (H) ± 0.5 mm / 17.13 * 2.69 * 0.57 ± 0.02 in 9. System prerequisites: Vista/Windows 7, 8, 10, Mac 10. Weight: approximately one kilogram 11. Color: Black 12. The Blue Switch axis