This is ultrasonic sensor distance measuring module which a non-contact distance measurement module. It has high measurement accuracy and its blind area is close (up to 2cm).
900 MHz 3 dBi Rubber Duck Antenna - SMA Male Connector
This robot uses custom length sides and 13 inch tires with IG52 082 RPM motors. We have included everything to make it ready to run including batteries, chargers, and a controller.