GDE Series Non-Spring Return Rotary Electronic Damper Actuator, Input Power:24 VAC, Hertz:50-60, 3Va, Operating Voltage (G-G0):24 VAC 20 ,-15 , Standard Cabling, 44 Lb-In Torque, Designed for Modulating Control of Dampers, Self-Adapting Capabilty for Maximum Flexibility in Damper Positioning, Manual Override, Dims:5 3/8"H X 2 9/16"W X 2 1/4"D, Weight:1 Lb 8oz, In Mfg Box, Made in USA.