This Mini Two-Channel Remote Control Module is perfect for toy accessories and DIY projects, allowing for easy control and . With its compact size and fine design, this module is ideal for creating innovative and interactive toys. Features - - Material:Copper - Size: 3.50X3.00X1.00cm/1.38X1.18X0.39in (transmitter) - Size: 2.40X1.90X1.00cm/0.94X0.75X0.39in (receiving board) - Transmitter voltage: DC3V - Receiving board voltage: DC3-4.5V - Mounting hole: applicable to M2.3/M2.5 screws - Remote control distance: about 3-5 meters - Wiring method: The red, black wires are connected to the power supply, and the yellow and are connected to the motor. - Encourages scientific exploration with the 2-Channel RC Module. Foster practical skills and thinking. - The DIY parts can bring much more joy to your kids and they will learn so much in the process of having fun. - This DIY RC Module allows students to conduct multiple experiments and is great to share with family, friends, or classmates. - Easy to use, not only for home, but also for school, better attract students, cultivate their active learning towards science. - It can be equipped with 130, 180, 300 and other micro motor to make electric remote control cars. Package list: 4 x circuit boards 4 x antennas