1Pure copper core motor, strong power, low energy consumption and long life. 2Stepless speed regulation, low current, good stability, support fixed speed driving. 3The 2035cm/7.913.8in stretchable handle can be adjusted freely according to your needs. 4Highquality aluminum alloy motor, antiwear, antirust, anticorrosion, and durable. 5Adjustable propeller depth and motor installation direction, simple installation, no complicated tools needed.