MasTrack GL300V - Portable Live GPS Tracker on Verizon's Nationwide Network Small enough to fit in a pocket and rugged enough to be mounted under a vehicle 14 days on a single charge (Average 8 days with 1 minute interval reporting) Unlimited email and text message alerts for SOS, speeding, geofence, etc Access from any internet enabled device. No software required. Android and iOS app available Nationwide coverage (USA). Real time GPS updates up to every 1 minute on Verizons Nationwide Network. Premium Monthly Subscription for $22.99 a month.