Features: 1. Providing clear and healthy water for your fish,reducing the microbial load of the water. 2. Make ozone from the normal air for the pond and tank ozonizer 3. Highly reducing the nitract,ammonia and pollutants in the water 4. Improving the oxygen content of oxidation-reduction protential in the water. 5. Note: the ozone generator can not be used in water, must be used with an air pump. Specifications: 1. Material: Plastic 2. Voltage:220-240V/50Hz 110-120V/60Hz 3. Power:6W Caution: 1. We may send you a plug adapter(EU, US, AU, UK,etc) according to your country . If you need another type, please leave a message after ordering or contact us directly. 2. Please double comfirm your local voltage and frequency before you place the order.If not match,the machine would not work.