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).
10k Ohm 1 Gang Linear Panel Mount Potentiometer 10 Turn Wirewound 2W Solder Lug
Waterproof ultrasonic distance sensor. This sensor can be used for collision detection in your project.
A ready to ship prebuilt tracked robot. It features IG42 122RPM Gear motors. Controller, battery, and charger included.
RPLIDAR A1 LIDAR - 360-degree two-dimensional 12 meter laser range scanner (LIDAR).