FreshWater Smart Monitoring Sensor - Smart Water Monitor for Spas & Hot Tubs - Smart Monitoring Sensor for Salt Systems - Sensor with Hourly Water Testing to Help Maintain Clean, Natural-Feeling WaterBrand: FreshWater Color: Blue Features: Soft & Natural Feeling Water: This FreshWater IQ water monitoring sensor is designed to help you maintain clean, natural feeling water in your hot tub with minimal effort, so you can spend less time monitoring and more time relaxing Effortless Smart Water Management: Maintain clean water with automated monitoring for your spa that regularly tests your water and indicates when adjustments are needed for pH,