building block accessories<br> [8881 AA Battery Box]The power system 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).[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.[2.4G Remote Control & 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).[Adapt to Most Building Block Devices]The whole set can basically adapt to most type of building block Devices in the market.[ 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.<br> [8881 AA Battery Box]The power system 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).<br> [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.<br> [2.4G Remote Control & 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).<br> [Adapt to Most Building Block Devices]The whole set can basically adapt to most type of building block Devices in the market.<br> [ 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.<br> Material:ABS plastic<br> colour:Grey<br> Package Contents:<br> 2 * Medium Motors<br> 1 * Battery Box<br> 1 * Infrared Remote Control<br> 1 * Receiver<br> Only the above package content, other products are not included.<br> 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.Product Notes: Please allow a little manual errors.Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please confirm acceptance before ordering. About Shipping: Please ensure your shipping informations are correct to avoid delivery issues. All orders are shipped within 3 days after payment. Delivery usually takes 8–12 days, The specific delivery time is depend on circumstances. If you have any questions during your purchase, feel free to contact us. We will respond you within 24 hours.