CUBE HEATER is a personal electric heater. Hanmir Co., Ltd. has developed a coating that enhances thermal efficiency by 120%, and the first concept to apply it to hot wire is the CUBE HEATER. When the paint is applied to the hot wire of the electric heater, a solid color state in which light is not transmitted is obtained. We needed an effective visual indicator because the light from the hot wire was not passed to the outside, and we used a single LED but thought about how we could verify the operation in different directions and angles. CUBE HEATER heater was designed with only two cubes. The upper cube is a structure that can generate heat and the lower cue is a simple structure without any device. You can complete the installation simply by placing another cube on a transparent cube.