Pocket Radar™ is the world's smallest full performance radar gun. This award-winning device delivers the same great accuracy and performance as other professional radar guns, at a fraction of the size and cost. Perfect for a wide variety of applications including traffic safety, R/C hobbies and running sports. Manual trigger: you time what you want to measure and when you want to measure it. (If you want to measure Ball Speeds then the Ball Coach™ radar is a better choice). Measures: 7 to 375 MPH (11 to 600 KPH), Accurate to within +/- 1 mph, it gives over 10,000 readings on a single set of batteries. Includes a hardshell case, wrist strap, 2 AAA alkaline batteries, and an illustrated Quick Start Guide.