Features: 1. 3 Channel dosing pump, each channel provides 1 to 9999ml per day 2. Allows user to keep their Tank parameters stable, removes the need for mixing supplements daily 3. Allows for dosing in both large and small increments 4. Plug and play after it is calibrated with a graduated cylinder 5. Easy to use controller, each pump can be programmed Individually Specifications: 1. Material: ABS 2. Voltage:100-240V 50/60Hz 3. Power:4w 5.5w 7.5w 8.5w 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. Damage is possible if the pump work without water for long time. 3. Please read the manual carefully before you use the item.