Feature: 1. Can test 4 parameters for pool & spa water quality test: chlorine, free chlorine/bromine, alkalinity and ph. 2. Quick and easy testing, just one single dip in the water, you will get accurate results in 0‑1 minutes. 3. Easy to read, compare your test strip against thecolourimetric card, read results according to color change. 4. Comes in easy‑to‑store container, contains 10 strips per pack, long storage time and durable. 5. Lightweight and portable, convenient to carry. Suitable for swimming pool, spa, hot tubs . Specification: Item Type: Test Strips Material: Test Paper Color: As shown in the picture Weight: Approx.31g/1.1oz Test Material: Chlorine, free chlorine/bromine, pH, alkalinity Storage Method: Cool and dry place, avoid high temperature . Package List: 1 x Bottle of Test Strips(5 pack/bottle, 10 strip/pack, total 50 strips) Note: 1.Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. 2.Every small pack is the same.