4x4 Mercedes-Benz Zetros Trial Truck Anyone who loves powerful app-controlled motor vehicles, toy trucks and construction toys will have lots of fun building this LEGO Technic 4x4 Mercedes-Benz Zetros Trial Truck (42129) toy model set. Packed with realistic features, this RC truck toy offers an engaging build for adults and kids aged 12 and up. Open the cab doors and bonnet. Check out the working suspension on all 4 wheels and open the service hatch to inspect the gearbox. The model also features a detailed engine with a spinning radiator fan. In a first for LEGO Technic, this model has differential locking. Lock and unlock the differentials using the app to manoeuvre the truck over rough terrain. With this remote control truck model, the build is just the start. This set is ideal for anyone who loves trucks, cool vehicles and buildable RC cars. Build an authentic model version of the 4x4 Mercedes-Benz Zetros Trial Truck. Then put it to the test using the CONTROL+ app. Key Features: One of the app-controlled motor vehicles series, the 4x4 Mercedes-Benz Zetros Trial RC Truck model is packed with authentic details This remote control truck features a detailed engine with a spinning radiator fan, working suspension on all 4 wheels and a detailed gearbox In a first for LEGO Technic, this model has differential locking controlled via a free LEGO app to manoeuvre the truck over rough terrain This RC app-controlled LEGO Technic truck is powered using 1 x Bluetooth-controlled smart hub, 3 x large motors and 1 x medium motor Includes race-themed stickers, 2 fire extinguishers and flags creating an obstacle course to test the truck\\\'s skills across different terrains Requires 6 x AA batteries (not included). The battery box disconnects easily, making it simple to change the batteries when required A great set for adults & kids aged 12+ to enjoy together, this large LEGO set is also an awesome challenging building experience for LEGO fans