15PCS Technik Power Functions Remote Control and Rechargeable Lithium Battery Set Compatible with Lego Technic, 92693, 76537, App, 50cm Extension Cord, App Control, Programming (STEM+Technic)

I tested this product thoroughly with other clone part/motors and Lego brand ones. It worked great.It's a very nice way to be able to control up to six motors remotely in a model, up to 4 of them in proportional mode. The joysticks make dual features such as tracks very easy to control, as they both function for two motors both forward and reverse with some speed control, the right one running A/B and left joystick C/D motors. Four buttons on the front of the controller are for E + F, backwards and forwards. There is also a forward/reverse switch for each motor incase you need to change one of them individually for any reason.The RC control unit and the battery pack with 6 output connections BOTH are totally rechargeable, and you can see in the battery compartment in the back of the unit that there are NO connection for the batteries at all, only the space that they would fit in if it was DUAL BATTERY and RECHARGEABLE (unlike the ad! And also there is no screwdriver included as you don't need one for the battery placement).The power unit IS somewhat larger than a standard Lego/clone battery pack, as shown in the pictures for size comparison. (Lego/Clone single controlled power pack is 4x8x4h in bricks, this is 5x9x3 1/3h in bricks, but when you put a power plug on the top it comes to right at 4 bricks high, making it actually slightly shorter in use, but one brick wider and longer; certainly a good size for 6 motors individually controlled!)There is only one charging cord (would be nice if two) but it's a standard USB micro type. Also included are 4 each simulated hydraulic rams and smaller shock absorbers. Nice touch and always useful in my thinking. Plus one extension wire with the "Lego" type connector if needed for a motor that's needs to be reached farther than the standard motor cords.The one real bugaboo in this kit is the instructions. Perhaps I'm just not up on the latest techno jargon, or perhaps it's a case of VERY poor translation to English, but for me it was MUCH easier to just fumble around with the kit, learning how it works than attempting to make heads or tails of the little instruction page.I do think it's a great buy for one's MOC's at $36, as that's cheaper than even one rechargeable battery pack from the Brand name company last time I looked! I'm super pleased with this kit! (I did toss the VERY ugly box 🫤)

This remote control and rechargeable lithium battery set offers a versatile solution for controlling building block models. With various speed controls and compatibility with different building block kits, it adds an interactive element to play. The ability to program through an app enhances the experience, making it suitable for STEM enthusiasts and creative players. The inclusion of extra components like simulated hydraulic rams adds value to the set. However, the instructions may be challenging to follow for some users. Overall, it's a practical addition for enhancing building block creations.