Plug it in and breath instant fresh air with this USB Wireless Mini Air Purifier Available as a pack of 1, 2 or 4 With it's USB and wireless design you can plug it into any USB port or plug Perfect solution to getting fresh air when you're stuck working at home or in the office Plug it into your computer, car or by your bedside so you can breathe in clean air Has a twist around cover so you can keep it protected when taking it on the go Ideal for any allergy or asthma sufferers to give you purer air that won't irritate you Buying Options: 9.99 pounds instead of 19.99 pounds for 1x purifier - save 50% 13.99 pounds instead of 24.99 pounds for 2x purifiers - save 44% 19.99 pounds instead of 29.99 pounds for 4x purifiers - save 33%