SEEMEY 9PCS technical-parts, Power-Function-parts-Set Battery-box Infrared-Adjustable-SpeedRemote-Controller-Receiver L-motor-M-motor Compatible with mainbrands

Remote has great signal!

My kids and I have had a lot of fun coming up with different ways to use these motors and lights. Really the only limit to the fun you can have with these motors/lights is your own imagination. They are a great way to bring your building block creations to life.I was a bit worried that my kids would have some trouble building with these parts, but after showing them how to connect and use the wires they got the hang of it really quickly. They have built helicopters, vehicles, wacky amusement park rides, and even catapults with these. The parts from this set are compatible with the major name-brand building blocks and they stay connected pretty well. So as long as you have a decent collection of building blocks on hand, you'll have plenty of parts to build and experiment with.The wires, motors, lights, battery pack, controller, and wireless transmitter that come with the set are all built with high quality materials and seem pretty sturdy. We haven't noticed any issues yet while playing with them, even after my kids managed to get the wires tangled up pretty good. It seems like these parts will all last a good while.I'd say that probably the only negative aspect to this set is the fact the controller works like two separate dials. I think the design would have worked better if they were buttons or control sticks. Using the dials makes it hard to maintain control over your device if you are trying to build a steerable car or something similar to that. You can really only control the speed of the rotation in one direction with the controller since it takes too long to rotate the dial back and forth between a forward/reverse spin. If you could control the speed and direction of the rotation with control sticks, it would have been a bit more fun to play with.Overall, this building block motor/light set is a pretty good value for the price considering what comes in the set and the quality of the parts. We recommend it to anyone looking for a cheaper alternative to the somewhat over-priced name brand sets.

I was looking for an affordable power system for my Christmas train set and this will absolutely do the trick while also having fun with other sets. A few notes:PROs:- this is radio frequency for the controller, NOT infrared. RF is so very much better than IR as it does not require line of sight from controller to receiver (like a basic TV remote does.). Instead the radio waves work through many obstructions in the same room. Not sure why the description in the product information still says IR as it is absolutely RF.- The stud connectors and brick design work well with other manufacturer building block products, but the electrical connections are proprietary and will not work with different brands.- There are four RF frequencies so you could combine multiple receivers and switch between them or have different controllers on separate RF so they do not interfere.- The lights are basic, but small and can be used in a lot of ways.- plenty of motors and combinations with all the partsCONs:- Like the LEGO counterpart, the battery bank takes 6 AAs and is pretty bulky to incorporate into many builds- I would have liked more lights, but maybe that is because I was finding so many fun ways to use them.- Not compatible with other systems electrical partsOverall, an excellent value for everything you get and what you can do with them.

This set of motors for Lego Technic kits is really nice. They work as they should, and they're compatible with the Lego bricks. My only complaint is that it's really difficult to install/remove batteries. And they require a LOT of batteries. I get the child safety issue, but the little teeny screws are easy to strip out and lose, and they make it even more difficult getting to the batteries. Overall, they do a good job for what they are, it's just the battery situation that I'm not keen on.

This review is for SEEMEY 9PCS technical-parts, $40 on amazon.ONE BIG CORRECTION to the Amazon write-up and parts titles/descrilptions. The Remote and Receiver are NOT IR (Infrared). They are RF (Radio Frequency). This is an important distinction since IR only works line-of-sight whereas RF works through obstructions. I checked out the RF reception at about 40 feet in another room and it was fine. May very well go much further.In order to pair the remote to the receiver you must use the slide switches to match the channel number, 1,2,3 or 4. Mine came with channel #4 as the default.The orange rotation ‘speed’ knobs on the remote change the rotation direction of the motor when the knob rotation is at 50%. This is in addition to the black motor direction slide switch. When controlling the LED lights the rotation of the controller knob varies the light intensity.The square push button beneath each rotary knob shuts off the motor/light. You don’t need to push this button to power on the motor or light. They get powered on as soon as the rotary is moved.The battery pack takes six AA batteries (three on each side). You’ll need the small Philips head screwdriver (provided) to remove the screw from each end of the battery pack to permit the two battery covers to be slid off for access. The remote control takes three AAA batteries. There too you need the small screwdriver to remove the screw from the battery cover. The cover doesn’t offer you any place to pull up on it with your thumb nail. I needed to stick a piece of 3M tape onto the cover to pull it up.The left and right remote speed knobs automatically associate themselves with the two connection locations on the receiver.I’d take away a star because of the IR versus RF mistake but the error is in a more favorable direction (RF is better than IR). So I’ll give five stars to this product.