LCD 3d Crystal Digital Electronic Aquarium Thermometer Digital for Fish Tank Transparent crystal glass shell shape High sensitive electronic sensors with precise chip, accuracy up to 0.1. Mini size and light weight, easy to install Size: 7 x 2 x 1.5 cm/ 2.8" x 0.8" x 0.6" Package Includes: - 1 x 3D Digital Electronic Aquarium Thermometer - 1 x Button Battery