The Digital Temperature Tester from Summer Infant helps to regulate water temperature. This cute little guy features red, yellow and green LED lights and a large LCD screen to show parents if the water is too hot, too cold or just right. The water temperature is recalculated every 10 seconds and there is a 10 minute auto shut-off feature to preserve battery life. The smiling turtle design and self-floating capability makes it a great bath toy as well.