When the water boils, a whistle sounds from the steam. You don't have to worry about boiling dry. Compatible with IH cooking heaters and gas stoves. (Compatible with IH 200V and 100V) For making barley tea or hot water. Made of stainless steel, which is rust-resistant and highly durable. Made in Japan Full capacity: 2.5L Usable capacity (amount of water that can be boiled): Approximately 2.0L Material: Body = 18-8 stainless steel, Bottom plate = 18-0 stainless steel, Whistle part = nylon resin, Handle/Knob = phenolic resin Size: Approximately 19.5 x 22 x 23cm Weight: 650g Y421