MISINI22 Pieces Technology Power Functions Set, Including XL/L/M/Servo Motors kit (RC/APP,Parts Shaft Cross), Remote Control Battery Box, Extension Cable Light Cable

It is a great toy for kids that like to invent with legos ! My 8 years old loved it! It was what he wanted!

You need to have Lego electronic experience to enjoy it as there is not much direction. My has been in a after school program that learn to use this stuff. If you know how use it then it is user friendly.

I tested the motors when I got it and they all worked. Then I built a remote control car and the servo motor suddenly stopped working. I tested the servo motor multiple times and it just didn't move.

I had 2 of this stuff. Battery died after 2 days both. You need to order extra battery separately

My grandson bought this using his birthday money, it worked for exactly 30 days and will no longer hold a charge. I feel bad for him because this was a learning experience for him spending his own money.

Literally needed to use a magnifying glass to read the direction sheet which was poorly translated in broken English.

If you're looking for a set with a servo motor that works like a servo motor, look somewhere else. The servo included here is 100% one direction or the other, no "steering" possible as there are only 3 steps (-90, 0, 90).

Battery Pack does not even work. App does not download, It is a rip-off and waste of money