It "s bluetooth keyboard made of sillicone. You can not only clean it with soap and water, but also makes itself resistant to any dirt, coffee or tea.Use the cloth wipe up the oil or organic liquid,it can still working. Don"t have to worry any sharp edges which may hurt the keyboard as it can be easily kept in your briefcase,backpack or notebook carrying bag for it folding and pocket size. Specification: Bluetooth Version: Bluetooth 3.0/2.0/1.2/1.1 Interface Key: 87 QWERTY Function keys Operating Distance:8-10 Meters Built-in rechargeable Li-ion battery: 200mAh Charging Time:about 2 hrs. Working Time:24-48 hrs, Standby time:30 days PC System Requirement: all Apple notebooks and Windows 98 /ME/2000 /2003/XP/Vista/7OS Mobile Phone System: all iPhones and SymbanS60,V3, Windows MobileV6.0 and Android 3.0 or above Material: Silicone Weight:200G Dimension:3.34x 4.33 x 0.43 in(L x W x H) Compatibility: Tablets: Onlycompatible with the iPad and all Bluetooth-enabled SAMSUNG tablets.( the function keys may work different for different tablet model.) Notebook / PC : Compatible with all Macbooks and all Bluetooth-enabled notebooks with Windows 98 / 8 / ME / 2000 / 2003 / XP / Vista / 7 OS systems. Cellp hone:Compatible with iPhone 4&4S/ iPhone 3G&3GS / iPod Touch / Samsung P7500/7510/7300/7310 and other mobile phones with SymbanS60,V3, Windows mobile V6.0 and Android 3.0 or above system. Note: 1. Before connecting with PC, confirm if your PC is with bluetooth function in internal system,otherwise, you need buy bluetooth adapter for connection 2. This keyboard is specailly designed for iPad and iphone, so some hot keys and function keys may not work for PC,desktop computer and mobile phones, while the numeric keys and letter keys can be used normally. 3. There is no LED indicator for CAPS LOCK. Warranty:12 months,easy returns/exchanges.