About this item This fits your . Make sure this fits by entering your model number. MISINI engineering series crawler loader, 2.4G and app dual control system, stable and no interference, power upgrade, including medium M motor*2, large L motor*5, Bluetooth lithium battery*2, 2.4GHz remote control device*1. Use 2.4G remote control or bluetooth app to control many interesting and realistic functions. Made of high-quality high-precision mold injection molding, using abs environmental protection materials, the surface treatment is smooth without burrs, each panel is fixed in place, odorless, green and environmentally friendly. The technikal model kit is thoroughly tested to ensure that each building meets the highest global safety and quality standards. Function: happy build YC-22011 technical excavator locomotive kit: including a bulldozer that can be rotated up and down, a forehead pusher that can be rotated up and down, a simulated cab, and gear-linked crawler driving and turning. Details: Long battery life upgrade lithium battery, full building blocks, restore rich functions and details, real replica of large bulldozers from the inside to the outside, Technik toy models are compatible with all LEGO building block kits, perfect technology parts and basic parts combine Contains professional and detailed assembly instructions, the construction steps are very clear, suitable for people over 14 years old, comes with beautiful original packaging, it is an ideal gift for technikal car fans, if you have any suggestions, please contact us in time, we will be resolved asap