This is a 9V battery clip typically used for our wireless cameras. The ID is 2.1mm, the OD is 5.5mm. Center positive.
9V Battery Snap with 12" Leads
This is our LT2-F NIST qualified security robot with an enclosed robot chassis with rear flippers/stabilizers, camera tilt system, custom controller, video console, and battery charging station.
YDLIDAR G4 LIDAR is a 360-degree two-dimensional laser range scanner (LIDAR)