... LCD display Jiangsu Province Jingchuang Electric Co., Ltd --- Elitech Aquarium thermometer SDT-2:Features:Fashionable and elegant appearance, specially water-proof ... clear, easy to read.Instruction: 1.Turn off the battery cover, put into one LR44 Button cell. Please ensure the ... battery the LCD will display immediately. 2.Turn the battery cover firmly. Please ensure the sealed circle to place rightly ...