This product is quite good. Its easy to use; it can change the polarity and there is stop position. I didnt give it very good rating because I dont nearly never use it because u can use the remote controls so its nearly useless. If u buy it u wont need many. I would like if there was also a speed dial like in rechargeable battery box in this swithc. Then it would be more usefull

You put inline between the battery box and the motor it switches polarity and has an off position. It does exactly what it is supposed to do easily . If it could be smaller that would be nice.