<p>[8881 AA Battery Box]The featuring with AA battery box which can run 2 xl-motors or 4 m-motors at the same time, requires 6 AA batteries (battery not included).</p> <p>[M Motor 8883 for High-speed] The motor provides strong power. High-speed and small-torque building block motor power supply kit. Support forward and backward.</p> <p>[2.4G Remote Control \u0026 Receiver]The motorized system feature 4 channel selector on remotes and control. They need to be set on the same channel to work together.The Remote Control powered by 3 AAA batteries (battery not included).</p> <p>[Adapt to Most Building Block Devices]The whole set can basically adapt to most type of building block Devices in the market.</p> <p>[Safety and Learning for kids]Made of high-quality ABS plastic materials.By assembling building blocks, children can exercise their hand-brain coordination ability, stimulate their imagination, and make them enjoy the joy of doing things.</p> <p>Material:ABS plastic</p> <p>colour:Grey</p> <p>Package Contents:</p> <p>2 * Medium Motors</p> <p>1 * Battery Box</p> <p>1 * Infrared Remote Control</p> <p>1 * Receiver</p> <p>Only the above package content, other products are not included.</p> <p>Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.</p>