【Perfect Compatibility】Servo motors and functional accessories. All parts are compatible with popular building block brands and remote-controlled building block models. You can combine and match parts according to your needs and preferences. Note: This product does not include a power function battery and must be purchased separately. 【Remote Control and Receiver】The motorized system has 4 channel selectors on both the remote and the receiver. They must be set to the same channel to work together. The remote control is powered by 3 1.5V AAA batteries (batteries not included), 2.4G four-channel switch with 4 modes, and can remotely control 4 receivers. 【Fun and Safe】Assembling the motor is not only fun but also a challenge, allowing users to improve their practical skills and unleash their creativity. The Technic Motor Set offers hours of fun and makes a fantastic gift for birthdays, Christmas, and other special occasions. 【Perfect Gift Choice】This product is not just a toy, but also a new endeavor on the path of learning and education. The durable motor set provides hours of fun, and building the blocks allows your child to practice hand-eye coordination, stimulate imagination, and have fun making things. Warning: Use with adult supervision