DCC Model Trains. Plug-In Walkaround Throttles versus the Wireless Walkaround Throttles
Both the plug-in walkaround throttles and the wireless ones have their pros and cons, the preference for one over the other largely depends on the specific requirements of the user.
If you are looking for a cheaper alternative then you can go for the simple plug-in one. Two main disadvantages of this arrangement are that you will be restricted to the layout and whenever the controller is unplugged the train will come to a halt.
The more modified wireless walkaround throttle eliminates these bindings and allows you to take full control of your train from anywhere on the layout.