This stir plate is ideal for use with TA Testing in wine because of its built-in probe holder. This makes using your pH meter to determine the end point of the test extra easy to do.,,Use with either our W501 Acid Test Kit or our MT150 Advanced Acid Test Kit for fast, accurate results.,,Stir plate features an on/off switch as well as a speed control dial. Standard 110V power. 1 year warranty.