A telematics device is an instrument, usually provided by your insurance company, that you install into your car. It records information about your driving behavior, including how fast you drive, how fast you brake, and the distance you drive.
Insurers use telematics devices in special safe driver programs, including Snapshot from Progressive, Drive Safe & Save from State Farm, and SmartRide from Nationwide. These driver safety programs will help you save money on your insurance premiums by monitoring just how safe you drive.