you do not need to maintain the motor at all. QUITE BUT POWERFUL: The running sound is now lowed to less than 60dB. Powerful dual thrusters produce up to 26.5 lbs (12 kg) of thrust

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2. you do not need to maintain the motor at all. QUITE BUT POWERFUL: The running sound is now lowed to less than 60dB. Powerful dual thrusters produce up to 26.5 lbs (12 kg) of thrust