Features: EFFECTIVE IN CLEANING - Effectively help you clean the tank, water pipe and other parts of the toilet. LONG-LASTING - Each toilet cleaner tablet lasts up to 15 Days (or 20 flushes daily), 12 tablets are for 6 months supply. BTW, each toilet tablet's may vary. HOW TO USE - DO NOT tear off the blue outer protective film, which is soluble in water tank directly. Please leave the toilet tank cleaner in the water tank for at least 10 minutes to dissolve sufficiently until water gets blue before flushing. POINTS FOR ATTENTION - When the blue toilet bowl tablet dissolves completely, the blue will fade, a new toilet tank cleaner should be put into . This product cannot completely replace the toilet brush. It is mainly to help maintain a clean toilet tank and reduce the dirt accumulation on . Please clean the toilet tank with a toilet brush before the first-time use, so as to make a better use of this product. CONVENIENT AND EASY TO USE - toilet cleaner is convenient and easy to use. It will not cause any damage to the internal parts of the toilet tank. Product Description: packing including： 1*Automatic Toilet Bowl Tablets EFFECTIVE IN CLEANING - Effectively help you clean the tank, water pipe and other parts of the toilet. LONG-LASTING - Each toilet cleaner tablet lasts up to 15 Days (or 20 flushes daily), 12 tablets are for 6 months supply. BTW, each toilet tablet's may vary. HOW TO USE - DO NOT tear off the blue outer protective film, which is soluble in water tank directly. Please leave the toilet tank cleaner in the water tank for at least 10 minutes to dissolve sufficiently until water gets blue before flushing. POINTS FOR ATTENTION - When the blue toilet bowl tablet dissolves completely, the blue will fade, a new toilet tank cleaner should be put into . This product cannot completely replace the toilet brush. It is mainly to help maintain a clean toilet tank and reduce the dirt accumulation on . Please clean the toilet tank with a toilet brush before the first-time use, so as to make a better use of this product. CONVENIENT AND EASY TO USE - toilet cleaner is convenient and easy to use. It will not cause any damage to the internal parts of the toilet tank. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.