This is a standard battery clip that attaches to a 9V battery. It has 12 inches of wire.
This is a 9V battery clip typically used for our wireless cameras. The ID is 2.1mm, the OD is 5.5mm. Center positive.
This is a ROS programmable autonomous SLAM robot prebuilt kit that can be controlled via Gamepad. The MarvelMind IPS (Indoor Positioning System) provides indoor navigation. ODROID-XU4 SBC provides the most flexible platform possible.
SparkFun's minimal design approach to Arduino. This is a 5V Arduino running the 16MHz bootloader.