No batteries needed! The device absorbs energy from the water flow with a quick and easy installation without the need for tools. Add voltage regulator (2.8v-5v) to prevent water pressure from being too high to burn the thermometer's touch panel, and also to prevent water pressure from being too low to work. Easy to install! Connects to a standard 1/2 inch tube, easy to install and remove. 360 Rotary Display! Easy viewing on the temperature side from any angle. Ideal for home use, even for a five-star hotel bathroom. Buy it now as a surprise to your husband, wife or children. (especially for families who have toddlers or babies) Please note: Please make sure the shower hose can be disassembled before booking. The installation can be completed in 5 minutes.
