Schneider Electric Harmony™ Square D™ Wireless Pushbutton, Batteryless, Series: ZB5R, 22 mm Size, Momentary Contact Mode, Spring Return Operator, Bezel/Housing: Plastic, Round Actuator, IP30/IP65/IK03 Enclosure, Panel Mounting, -25 to 55 deg C, Red, Environmental Conditions: -40 to 158 deg F Storage Temperature, 95% Relative Humidity