Pocket Radar Classic model offers accurate speed radar in a convenient size for many uses including hobbies, traffic safety, industrial safety, neighborhood safety, scientific research and more. Small size of 2.3 by 4.7 by 0.8 inches (WxHxD) and only weighs 4.5 ounces with batteries. 10,000 readings on a single set of AAA batteries (included)
https://www.amazon.com/Classic-Model-Purpose-Pocket-Radar/dp/B003IM6YAM