Features Name: 3-in-1 Test Paper Detectable PH range: 6.88.4. Residual chlorine range: 010. Total hardness range: 0-240. High precision and easy operation Easy to carry Water testing for swimming pools or spa pools Can test effective chlorine, pH, total hardness. Quantity: 50 Strips Description: 1.EASY TO USE: Just dip a strip in water 2 seconds, take it out and wait for 15 seconds, compare each panel color changes to the color chart on the side of the bottle, then the results are obtained. 2.TEST FOR FREE CHLORINE, PH AND TOTAL ALKALINITY: Dont wait until your eyes burn and your swimsuit bleaches white to test your pool – just dip a test strip! 3. GOOD FOR QUICK USE: Precise PH test strips for water quality testing in swimming pools and spas to protect your health 4. KEEP WATER IN HEALTHY & CLEAN CONDITIONS: With these strips, help you maintain your swimming pool, Spas, hot tubs proper water chemistry, and always keep the pool water in a healthy and clean condition. 5.TEST OBJECT: free chlorine, pH, alkalinity Package Inclusions 50 Strips x Test Papers Note: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2. Please allow 2-3% measuring deviation due to manual measurement.