Spa water quality analyzer and pH -roe chlorine test The products are shipped according to the color or size of the main image on the product page. Characteristics: Made of premium plastic shell, durable and robust. A practical tool for testing the pH of the water and the chlorine level for the pool and the spa. Easy to use, you can quickly test if the chlorine and pH are in the ideal range. A large screen displays the result of the pH test and the chlorine level for easy and accurate reading. Specially designed for the pool or spa of family size. Specifications: Material: plastic Weight: 298 g / 10,5 oz Main body size: 190 * 120 mm / 7.5 * 4.7 inches Length of the handle probe: 150 mm / 5.9 inches Length of the probe: 48 mm / 1.9 inches (without black belt) Cable length: 130 mm / 5.1 inches Power supply: 1 * AA 1.5 V alkaline battery (not included) List of parcels: 1 * Chlorine PH CL2 analyzer with probe Remark: 1. You must prepare 1.5 ppm of chlorine solution in the water from the pool for calibration 2. If you do not know if the chlorine content is 1.5 ppm (or if you can not find a calibration point), use a traditional test strip 3. Once the pool is calibrated, it is not necessary to recalibrate unless it is modified to use another pool water to measure another pool.