Brand Motospeed Model K20 Quantity 1 Color Black Material ABS Key Numbers 104 Connection Method Wired Power Supply USB Supports System Windows 2000 / XP / Vista / 7 Other Features Key maximum load: 50+/-8g; Keys minimum resilience: >=10g; Key life: 10000000 times; Knocking at seven keys at the same time is available; Response time: 1ms (1000Hz); Keyboard uses full ABS plastic materials anti-collision and anti-shock; Ergonomic and durable; Enhanced data cable faster transmission and anti-sway. Packing List 1 x Keyboard 1 x Chinese / English / Japanese user manual