It can measure the fish tank water . The high-accuracy tool directly measures the water with precision and small error. This product is constructed with ABS material for and practical to use. Features -Material: ABS. -Size: About 4.80X6.00X2.50cm/ 1.89X2.36X0.98in. -Measurement range: 0~50°c -Measurement accuracy: ±1 degree centigrade -Maximum diving depth: 30cm -Use environment : 0~70 degree centigrade -Battery life: 6 months - Manufactured with premium ABS material, durable and practical to use. - Clear degrees with easy-to-read screen display. Small size, compact design, easy to use. - The excellent workmanship of our product will bring you a . - Great for aquarium or any place you want to monitor the . - The workmanship of this product is perfect, and you will have a good experience in using it. Package list: 1 Tank Thermometer