Features:* This drive is suitable for DC 12V brushless centrifugal blowers.* When the drive is turned on, the motor and fan cannot be connected or disconnected. The correct direction of fan rotation is counterclockwise rather than clockwise.* External controller controller can change speed by PWM or 0 - 5V signal.* Centrifugal blowers applications: air pump, air purification, soilless tillage, fuel cell, atomization, buffer air cushion machine, industrial dust removal, air cooling, fan, vacuum cleaner, sewing machine, fresh air equipment. Specifications:Product Name: Centrifugal Blower DriveColor: BlueSize: (Approx.) 90*55mm Rated Voltage: 12V Voltage Range: 9-16V Maximum Continuous Current: 8AMax Peak Current: 16A Hall Effect Angle: 120 Degree Suitable for: WS7040-12-X200N, 12V Blower Quantity: 1Pc Package Contents: 1 x Drive (Blower Not Included) Note:1. Transition: 1cm=10mm=0.39 inch.2. The actual colors of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.3. Please allow slight manual measurement deviation for the data.