Besides food, you can use a vacuum sealer to preserve a number of different items like sanitary wipes, baby wipes, batteries, etc. You can use it for anything that you think can spoil due to humidity or when it comes into direct contact with the air.
If you want to use one for preserving meat, get one with a thick seal band. To freeze vegetables and fruits, a sealer with a thinner seal band can also serve the purpose.
If you need to seal a lot of items frequently, you should get a heavy duty vacuum sealer. If you just need to preserve some fruits or vegetables and you think you won’t need it too frequently, you can get a basic one.
Make sure that the one you get is able to handle the job pretty well. You don’t want to get a cheap vacuum sealer which is not able to deal with the load you want to put on it.
There are vacuum sealers that you can plug in your car socket. Most of the time, you will probably use one in the kitchen. However, consider the length of the sealer if you think you will use it outside.
Most vacuum sealers have a safety system installed to prevent overheating and short circuits. Get one which is safe to use and able to do the job without malfunctioning.