Top-class accuracy: GPS satellite technology ensures a tight fix on the tracker's location for unsurpassed accuracy. In addition, the 3-axis accelerometer improves accuracy with motion detection. Perfectly discreet: The pocket-friendly device is only a little larger than a matchbox and can be discreetly placed nearly anywhere. The waterproof magnetic case (not included) allows for the tracker to be placed (or hidden) underneath vehicles. High-tech tracking at your fingertips: The information from the tracker can be followed on any device from computers (including both Mac and PCs) to tablets or mobile phones via the Spy Tec GPS platform. The service also tracks activity records for up to a year, delivering customizable reports that can track speed, time, and position across Google Maps. You can also set up several alerts, which can be delivered via text message or email, alerting you when the device breaks a certain speed, starts or stops moving, is low on battery, or even enters or leaves certain areas. Quick and easy geo-fencing: Another feature of the Spy Tec GPS platform allows you to fence off certain areas of the map and be alerted when the tracker enters or leaves the restricted area. Flexible subscription plans: The Spy Tec GPS real time tracking plan requires no contract or activation fee and can be stopped or started at any time. The monthly subscription (starting at $25 a month) allows for real time tracking beginning with minute-by-minute updates, upgradable to as often as every five seconds. Excellent battery life: The device comes with a long-lasting battery allowing for two weeks of continuous use, or even longer when used periodically.