... (DC1.5V) Jiangsu Province Jingchuang Electric Co., Ltd Aquarium thermometer SDT-1:Features:Fashionable and elegant appearance, specially water-proof design.Strong ... on LCD display bigger and clear, easy to read.Instruction:1.Turn off the battery cover, put into one LR44 Button ... supply: Button Battery (DC1.5V)SKY Elitech.liPE aquarium thermometer SDT-1