I am not sure how to feel about this UV sterilizer. The positive is that it is easy to install batteries and use. The cons would be that it does not come with an internal battery for it to be recharged and it does not use rechargeable batteries. The cord that it comes with is short and it has to stay plugs in to work. There is no way to check to see how effective the UV light is when it comes to getting rid of germs on a surface.