Using the Aerogogo Giga Pump 4.0 is a breeze. For inflating an air mattress, connect the pump to the mattress valve and choose the appropriate pressure setting - you can go for the strong 4kPa or the gentle 2kPa. Then just turn it on and watch as it fills up the mattress in no time. To deflate, switch the pump to reverse suction mode and it'll quickly suck out the air. When using the camp light, you can select different brightness levels according to your needs. Here are some things to keep in mind. Don't use the pump in wet or extremely hot conditions. Also, make sure the battery is fully charged before use. For maintenance, keep the pump clean and dry. If it gets dirty, you can use a dry cloth to wipe it. When not in use, store it in a cool and dry place.