Up to 92-key. The appearance of the human body engineering design perfect larger touchpad unique double mouse button. Innovative full-screen rolling function perfect experience (Fn+Touchpad) use dry cell concise and easy universal using environmental protection material all lead-free technology in line with ROHS standard innovative intelligent technology of code don't take the receiver is missing after all hotkeys unique design use more carefree. Product Parameter: 92-key(74 standard keys + 18 Media Keys). Built-in 2.4 G wireless receiver DPI can be adjusted. Working distance-10m. Working voltage: 3.3V. Current: < 50mA. Sleep current: < 1mA.