This Etekcity Electric Air Pump from Etekcity via Amazon.com drops from $19.99 to $16.99 when you enter the code KBDYEKUO at checkout. Other retailers are selling it for $28 or more. Shipping is free when you use a Prime account or free Prime trial. Shipping is also free when you spend $25 or more. Otherwise, it adds $5.99. The portable air pump can be used for mattresses, pool rafts, and more. It comes in the color black and has a one-year warranty. Sales tax is charged in most states.