Chair scale Chair Scale WE200P3 K(4weels) is equipped with backlight liquid crystal display, mounted on the back of the chair. Scale features: tare, remember the last result of weighing, and an additional filter - this feature enables stable reading during of weighing moving objects or ground vibrations. Scale has built in battery, which is sufficient for up to 50 hours of continuous work from a full charge. Weight can be powered with an internal battery or power supply.