Super 3 in 1: 3 in to 1 meter design. It can be used to measure the pH, EC and temperature of the solution. Large and clear LCD with backlight, easy to read and accurately measuring functions. Durable & Easy to Use: Temperature measuring range between to 50~70, able to withstand harsh conditions, offering longer durable services. Easy to operate, convenient to use. Portable Design: Pocket sized design with hanging hole, easy to carry, simple to operate and convenient for storage. Easily measure water quality at any time, suitable for indoor and outdoor use. Widely Use: Suitable for beverage, fish hatcheries, food processing, aquarium, photography, laboratory, quality control, school & colleges, swimming pools, water conditions. After sales Service: If there are any using problems or unsatisfactory with our products, please feel to contact us, we will consult the issues with sincerity. Thanks for purchasing from us.