Made for extreme conditions, the 4x4 Mercedes-Benz Zetros Trial Truck has the power to tackle the roughest terrain. Now you can build your own LEGO® Technic® version of this mighty machine. Enjoy a challenging build then use the CONTROL+ app to steer the truck and operate the differential locking. Set up obstacles and use the flags to create a trial course. Can anything stop this mighty truck? 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. LEGO Technic® App-Controlled 4x4 Mercedes-Benz Zetros Trial Truck (42129) model – 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.