This is a 7.4V 2200 mAh LiPo battery pack. Its made by 2 pcs LiPo cells of 3.7V 2200mAh each.
The B3 Compact charger is a very simple to use charger for 2S and 3S battery packs. No need for additional power supplies or 12v batteries as this little unit has its own built in power supply that can be powered with 100-240v.
This is a direct drive 4WD robot kit that uses Nexus mecanum wheels. The mecanum wheels allow it to vector in any direction.
Ultrasonic Module HC-SR04 Distance Measuring Transducer Sensor.