-Temperature : Working Air 0℃ to 40℃, Ambient Air 0℃ to 40℃. - RPM can be controlled by the input voltage. - When the blower is used for vacuuming, there is an approximate reduction of 5% in the performance. - Hard Mounting cvan be made by clamping around the motor's AL casing. - 2-wire power connection. (Yellow : (+) DC, Black : (-) DC), Improper connection will damage the blower. - An external drive controller that controlls the motor speed comes with the blower.