Unlike with many typical personal-use ozone generators, this item has an Output Adjusting Dial that regulates its ozone output from 100% to less than 40%, which ideally works together with a Redox (ORP) controller to control the quality of water in an aquarium or a fish pond. Applications: Water purification Odor elimination in indoor environment Kill germs, pesticides and bacteria, microorganisms in air & water sources, parasites Food Sterilization Decontamination, sterilization, and detoxification Features: Adjustable Ozone output Digital timer and "Constant On" function Low power consumption (10W) Silent with built-in air pump Capable to work together with Air Dryer Comes with 2 sets of high-quality air hoses and ceramic diffuser stones Free ozone application guide Compact and durable design Installation free, use instantly Air Dryer can be recharged by heating in a microwave or an oven Air Dyer and air inlet/outlet are included Specifications: Air Dryer Moisture Absorbing Silica Beads Volume: 200 ml Dimension of outlet: 6mm Air inlet: open Adjustable Ozone output level Maximum Ozone Output: 200 mg/hr without air dryer connection 500 mg/hr with air dryer connection Internal Air Pump Output: 1 - 2 L/min Power: 20W Timer : 1, 3, 5, 10, 20, 30, 40, 50, 60, 70, 80, 90 min (decreased by every 1 min interval) and Constant ON function Pump Pressure: 17 kPa Ozone Generating Method: Corona Discharge (Ozone Tube) Gas Resource: Ambient Air Air Inlet Dimension: 6.5mm Ozone Outlet Dimension: 6.5mm Size: approx. 215 x 150 x 60mm (8.46' x 5.91' x 2.36' inch) Weight: approx. 800g Power cable (length) : approx. 1.5m Power Source: either 110V 60Hz or 240V 50Hz (cannot be used simultaneously) Set Includes: 1 x Ozone Generator with Timer (OZX-300AT) 1 x Air Dryer 2 x Hoses (Air Tubing) 2 x Ceramic Diffuser Stones 1 x English Instruction Manual Standard factory package