Advanced edition compare with POER TM Series. Designed for those anglers enjoy convenient way of life. It has a telescoping main shaft (made from aluminum-alloy , anti-corrosion ),and a foldable telescoping tiller . Adjusting the length of main shaft , meanwhile, making handle horizontally , sliding the lock to″lock ″position. You can install it to the boat perfectly then. After using, sliding the lock to ″Release ″position ,the main shaft shorten to the bottom and tiller folded. The advanced feature is only one Lock controls both function.     Featuring 28, 34,44,54 pounds of thrust. Running on 12-volt power. QTM Series has a foldable telescoping tiller, a telescoping main shaft ,5 forward/2revers speeds, a 3-blade weed-less propeller, LED battery indicator and speed level indicator.