Meet the TurtleBot 4: an open source mobile robot made for researchers and educators. It has an iRobot Create 3 base and uses infrared, cliff, bump, and slip sensors to move around. It uses a 26Wh battery. This robot can move at speeds up to .306 m/s.
The mobile base has a Raspberry Pi running Ubuntu 20.04, ROS 2, and drivers. It also has a front-facing stereo camera and 2D LiDAR. More advanced users can use additional sensors through the USB hub.