The mecanum wheel robot car kit come with a pair of 18650 batteries and charger.
OMNI WHEELS ROBOT CAR: 4WD Omni-directional wheels and DC Speed Encoder Motor robotic car uses the latest mecanum wheels for omnidirectional movement and allow your robotics to not only travel forward and backward, but also sideways and diagonally((Left/Right Parallel Shift,Forward/Backward,Upper Left/Right Diagonal shift,Lower Right/Left Diagonal Shift).Perfect for tight spaces.
SIMPLE, INTELLIGENT, FUN PROJECT: Control your OSOYOO Omni Wheels Robot Car by Android and iOS App, allowing many additional functions such as imitation driving and WiFi controlled auto driving.This intelligent, new technology supports various projects such as line tracking, obstacle avoidance and gravity sensing control.
THE BEST VALUE PACK ON AMAZON: This Ultimate Gift Bundle Includes Everything You Need To Build and Engineer Your Own Robotic Car: WiFi Shield, Basic Board for Arduino, USB Cable, Model X Motor Driver Module, Bluetooth Module, Ultrasonic Sensor & Holder, Servo Motor, 3-Points Line Tracking Modules, Obstacle Sensors, Voltage Meter, Acrylic Car Chassis, 4 Motors 4 Mecanum Wheels, 18650 Battery Box.
MORE THAN THE BASICS: ADDITIONAL ACCESSORIES INCLUDED IN DIY ROBOTIC STEM SET: Basic Tutorial with Pictures, Sample Project Code, & Step-by-Step Instructions. Designed for Easy Assembly and Great Performance — Practice and Become a Master!
Installation Tutorial -- https://osoyoo.com/?p=30022 ;