How to inflate/deflate the electric air pump?1.Choose the correct nozzle size for your inflatable toys 2. Attach the inflation/deflation port to the inflatables to blow up/deflate 3. Press "I" on the power switch to turn on the air pump. 4. When finished, press the "0" key to turn off the pump, remove the nozzle, and seal the air valve. Specifications: Pressure: 0.64PSL Airflow: 440L / min Voltage:110V AC Rated Power:130W Package includes: 1 * Electric Air Pool Pump 4 * Nozzles 1 * instructions WARM TIPS:1. DO NOT use this air pumps for inflating high pressure products, such as tires, basketballs, balloons. 2.To avoid getting hot, DO NOT use electric air mattress pumps continuously for more than 15 minutes. 3. DO NOT put your fingers into the inflation or deflation port. 4.DO NOT put it near to items with high temperature, such as oven, heaters, etc.