HDE Wireless Bluetooth Keyboard for Windows Mac iOS Andorid and other Tablets (Silver Aluminum) Low Power Consumption: Lasts over three months (based on two hours use per day) with power-saving mode and space for two AAA batteries (not included) Easy to set up wireless connectivity for instant use Cross-Compatible, Universal, Bluetooth 3.0 Mouse works with iOS, Android, Mac and Windows Ultra slim (0.23 in), lightweight keyboard | Take your keyboard in your backpack, messenger bag, or case, perfect for travelling 700 hour continuous use battery life and automatic sleep mode allows up to half a year between battery changes (requires 2 x AAA batteries, not included)