Flexzion Digital Air Humidity Controller 110V WH8040 Humiidistat Hygrimeter Measuring and Controlling Range 1%~99% RH HM-40 Type With Temperature Sensor Cable Probe and Free Pen Function of humidification and humidification, Hysteresis function, Humidity correction, Delay protection, Function of Upper and Lower limit Humidity measuring range is 1% ~ 99% RH and control range is 1% ~ 99% RH Resolution: 1% RH; Sensor Type: HM-40. Power Suppler: AC 110V. Current: MAX 200MA. Data retention: YES. Temperature compensation: YES. Data Retention: YES Power consumption: &lt; 3W, Max 200mA. Relay contact current: AC 5A/110V