Powerful electric air pump -- the agptek air pumps are so powerful that it can not only inflate items but also deflate products by sucking air out! ( note: this air pump is not rechargeable and do not for balloons! ) 3 nozzles to choose -- we have 3 nozzles of different size in the electric air mattress pumps – s, m and l, allowing you to inflate/deflate different items in any occasions! easy to use -- the inflatable mattress pump is compatible with 12v dc and 110v ac power supply. to inflatable, just put the inflatable head at the filling hold, then press the switch. to deflate, you should put the inflatable head in the vent hole, then press the switch to deflate. our electric air mattress pumps are simple to operate. portable -- the inflatable mattress pump is small and lightweight, making it convenient to use .