In general this is basically a complete scale. I bought this around four years ago at a very affordable price and it hasn't let me down since. I haven't changed the battery in all this time. The only downside is the small plate (where you place the material to be weighed) which makes it hard to weigh Cannabis, for example. Also, weighing things that are under 50 mg is not a good idea, because there is a margin of error of about 25 mg, so determining doses for things like 2C-B may be pretty risky.