Features:Ergonomics design, comfortable operating by silicone keys.The key surface can be washed.The keyboard can be rolled for storage.Low noise, avoiding disturbing other people.Enjoy 10.0m / 32.8ft long-range wireless control.Plug and play, no pairing requirement, convenient for use. Specifications:Support system: For Windows 98 / Me / 2000 / XP / Vista, for Apple operating systemFrequency: 2.4GHzOperating temperature: -20 to 55℃Humidity: 20%-50%Effective distance: 10.0m / 32.8ftBattery: 2 * AAA battery (not included)Color: Black and grayMaterial: SiliconeItem size: 40.0 * 12.5 * 1.5cm / 15.7 * 4.9 * 0.6in (L * W * H)Item weight: 181.0g * 6.4ozPackage size: 13.1 * 7.8cm / 5.2 * 3.1in (D * H)Package weight: 204.0g / 7.2oz 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 stretch or distort the keyboard too hard. Package list:1 * Wireless keyboard1 * USB receiverFeatures:Ergonomics design, comfortable operating by silicone keys.The key surface can be washed.The keyboard can be rolled for storage.Low noise, avoiding disturbing other people.Enjoy 10.0m / 32.8ft long-range wireless control.Plug and play, no pairing requirement, convenient for use. Specifications:Support system: For Windows 98 / Me / 2000 / XP / Vista, for Apple operating systemFrequency: 2.4GHzOperating temperature: -20 to 55℃Humidity: 20%-50%Effective distance: 10.0m / 32.8ftBattery: 2 * AAA battery (not included)Color: Black and grayMaterial: SiliconeItem size: 40.0 * 12.5 * 1.5cm / 15.7 * 4.9 * 0.6in (L * W * H)Item weight: 181.0g * 6.4ozPackage size: 13.1 * 7.8cm / 5.2 * 3.1in (D * H)Package weight: 204.0g / 7.2oz 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 stretch or distort the keyboard too hard. Package list:1 * Wireless keyboard1 * USB receiver a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a