The VR1000 from Hemisphere is a GNSS Module with Frequency 1.53 to 1.56 GHz, Accuracy 0.04 to 2.5 m, Tracking Sensitivity -142 dBm(GPS Sensitivity), Cold Start 40 Sec, TTFF Warm Start 20 Sec. Tags: Module with Connectors, Module. More details for VR1000 can be seen below.