Ergonomics design, comfortable operating by silica . The key surface can be washed. The keyboard can be rolled for storage. Low noise, avoiding disturbing other people. Strong anti-jamming capability, enjoy 10.0m / 32.8ft long-range wireless control. This is a silica wireless keyboard. The key surface can be washed and the keyboard can be rolled for storage. Light weight and mini size allow you to anywhere. It is a perfect item for . Plug and play, no pairing requirement, convenient for use. Specifications: Support system: For Windows 98 / Me / 2000 / XP / Vista, for Frequency: 2.4GHz Operating temperature: -20 to 55 Humidity: 20%-50% Effective distance: 10.0m / 32.8ft Battery: 2 * AAA battery (not included) Color: Black and gray Material: Silica Item size: 40.0 * 12.5 * 1.5cm / 15.7 * 4.9 * 0.6in (L * W * H) Item weight: 181.0g * 6.4oz Note: The keyboard can not be contacted with sharp objects, oil, chemicals and fire. When folded, the product can not be squeezed. Please do not put heavy objects on the keyboard. Please do not or distort the keyboard too hard. Package list: 1 * Wireless keyboard 1 * USB receiver