Anyone who loves powerful toy trucks and construction toys will have lots of fun building this LEGO® Technic™ 4x4 Mercedes-Benz Zetros Trial Truck (42129) model. Packed with realistic features, this truck toy offers an engaging build for adults and kids aged 12 and up. Open the cab doors and hood. 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 spinning radiator fan. In a first for LEGO Technic, this model has differential locking. Lock and unlock the differentials using the app to maneuver the truck over rough terrain. Explore the app With this model, the build is just the start. Use the CONTROL+ app to put this mighty machine to the test. Use the different control screens to steer and operate the differential locking. With challenges and achievements in the app, there are so many ways to play. Fans of construction toys will love building their own model version of the Mercedes-Benz Zetros Trial Truck. Check out all its awesome functions using the LEGO® Technic™ CONTROL+ app. This LEGO® Technic™ 4x4 Mercedes-Benz Zetros Trial Truck (42129) model is packed with authentic details like working suspension on all 4 wheels, a detailed gearbox and differential locking. Realistic design features include race themed stickers plus 2 fire extinguishers. Use the flags to create an obstacle course and test the truck’s skills across different terrains. This is a great set for adults and kids aged 12 and up to enjoy together. It’s also an awesome toy for young LEGO® builders looking for a challenging building experience. The toy truck model measures over 8 in. (21 cm) high, 19 in. (48 cm) long and 7 in. (19 cm) wide. Requires 6 x AA batteries (not included). The battery box disconnects easily, making it simple to change the batteries when required. 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, included in the set. LEGO® Technic™ construction toys offer an advanced experience for LEGO fans who are ready for their next building challenge. LEGO® Technic™ components meet rigorous industry standards to ensure they are consistent, compatible and connect reliably every time – it’s been that way since 1958. LEGO® Technic™ components are dropped, heated, crushed, twisted and analyzed to make sure they meet strict global safety standards.