Super Heater Multi-purpose Nawasa Water Heater Product Features - Automatic shut-off when not in water - Plug into 220V or 110V No Transformer Needed - 100% Stainless Steel Inside - Rust-Free and Portability - Around 1.4m cord length Important: The dark particles that arises when heater the water is due to the dirt particles found on the water being heated (please see manual for more information regarding dirt particles). Please make sure that you are heating the correct type of water to avoid issues. Please remove the water heater before testing the temperature of the water to avoid grounding. If you are using an extension wire, kindly make sure that the thickness of the extension wire is thicker / bigger than the wire of the heater.