The Smart Stir is a handy gadget to help with accurate water testing. Water testing is an important part of keeping a successful home aquarium. For accurate testing most liquid test kits require the test sample to be mixed or shaken after the addition of a reagent.In some cases adding one drop of reagent at a time, shaking or mixing in between waiting for a colour change to occur. This can prove time consuming and often leads to the reagents being added without proper mixing in between. The Smart stir takes away the need to stop and shake the sample between each step.Simply place the test vial in the top of the unit, with the included stirring bead, press the button and the Smart Stir will mix the sample as you add the reagents. The white base and surround will also help you to see colour changes the moment they happen.Instead of having to change batteries in the unit, the Smart Stir has a built in rechargeable lithium battery. This can be charged easily using the provided USB cable, the low battery indicator will show when charging is needed. To save battery power there is also a built in auto shutoff after 5 minutes of continuous running.Compatible with most test vials the Smart Stir has a compact design and is mounted on rubber non slip pads to ensure stability during use.