What is the difference between a remote controlled and a manually controlled motorized golf trolley?

What is the difference between a remote controlled and a manually controlled motorized golf trolley?
LeaFun Sports : The remote controlled caddy can be operated via a handheld remote transmitter up to 100 yards distance. Like our TR Serial and R serial .The manually controlled caddy is also power assisted but steering and speed control needs to be performed manually on the handle, Like our E Serial and T serial . so you will have to walk close to the caddy while operating it. Some of the manual carts have a semi-remote capability called "timed advanced function" whereby you can send the caddy a certain distance forward stopping automatically. The remote controlled caddy can also be manually operated via a seamless rheostat control on the handle. It especially comes in handy when walking off the fairway or after putting, because you don't have to walk back to your cart.

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