Digital pool aquatester. Features: Offers high accuracy during reading - values are displayed on the display. Immersing the test strip in the whirlpool or swimming pool, accurate results are quickly achieved in seconds. You can measure: free chlorine or bromine, pH value and total alkalinity. Other features: Accurate and fast results in 15 seconds. LCD display. Numeric results. Memory retains the last 9 test results. Signaled LOW/OK/HIGH test results. Power: 2x AA batteries, not included. Package includes 25pcs of Aquacheck digital TruTest test strips. Waterproof, floats on the water surface.