Product DescriptionProduct Features: Speed Controller variable for single-phase fans. A stepless speed controller for single phase AC external rotor motors. A potentiometer may be used in lieu of input signals to provide manual control when in 0-10V control. Rated at 240V, 3 Amp, suitable for 50/60Hz 600VA up to 55°C. Brand Name: Fantech Trade Category: Accessories - Fan Speed Controller Input Signal Voltage: 0-10V (selected via an internal jumper) Rated Voltage: 240V Input Signal Measurement Accuracy: 2-20mA (selected via an internal jumper) Width: 110mm Height: 40mm Diameter: Ø50mm Amperages: 3.0 Amps Suits (Hertz): 50/60 Hz Suits (Volt-Ampere): 600VA Suits (Celcius): 55°C Phase: Single Note: When used to control a number of identical fans the sum of the full load amps of all the connected fans must not exceed 85% of the maximum rating of the controller. The fans should be identical. Brand & Design: Brand: Fantech Trade SKU: FANAVA3.0 Warranty:1-year replacement warrantyThis fitting must be installed by a licensed electrician.