[feature] 1. Unique design, no special exhaust device required 2. Airtight design, no leakage 3. Flexible external controller 4. Fully automatic low water level design: when the water pump stops working, the water level will automatically decrease to avoid soaking chlorine pills and prolong the service life of chlorine pills 5. No need to pass through other equipment, the disinfectant is directly injected into the swimming pool or bathtub [product information] Product name: Disinfectant dispenser Product size: Doser: height 132mm, diameter 125mm, bottom diameter 45mm color: blue Packing list (available after purchasing an item): Doser X1 Effervescent tablet X1 bottle beg to be excused: 1. Due to the long shipping time, the item may be damaged during the transportation, if the item is damaged, please leave us a message through the official website immediately before leaving a comment, and I will solve the problem for you. 2. Due to manual measurement, the size may have an error of 1-3cm. 3. Color may vary by monitor.