Specification:  Product Name: Mecanum Wheel Programming Smart Car.  Chassis Size: 215x188x71mm.     Features:  - Mecanum wheels move in all directions, programmable integrated chassis, support line patrol and ultrasonic obstacle avoidance, and support graphic programming.  - Plug in standard development board, compatible with other development boards of the same size as Arduinos.  - Competitive microphone, stable and wear-resistant.  -Multi-functional aluminum alloy motor bracket, which can install various types of motors.  - Driven by a large steering gear, adopts a large bearing gimbal, rotates smoothly and original electronic trigger, supports independent power supply.     Note:  Water bombs launcher is more powerful, pay attention to safety.     Package Included:  1 x Integrated Chassis.  4 x Mecanum Wheelss.  1 x Water Bombs Launcher.  1 x Water Bombs (about 10,000 pieces).  1 x Development Board.  1 x Aluminum Alloy Motor Bracket.  1 x Hardware Accessories.  1 x PS2 Wireless Controller.  4 x Motors.  2 x Servos