HC-10 Features: -Thermometer. -Helps owners to keep an eye on the temperature of their hermit crabs habitats. -Two numbers light up at the same time then the temperature is halfway between those numbers. -Mount horizontally or vertically. Product Type: -Thermometers. Reptile: -Hermit Crab. Generic Dimensions: -8.33 H x 0.04 W x 0.58 D. Dimensions: Overall Height - Top to Bottom: -8.33 Inches. Overall Width - Side to Side: -0.04 Inches. Overall Depth - Front to Back: -0.58 Inches. Overall Product Weight: -0.01 Pounds.