50 Screen Size: 3.5 Inch Global Sat Gps Receiver, Plastic

High sensitivity (Tracking Sensitivity: -163 dBm) Extremely fast TTFF (Time To First Fix) at low signal level Support NMEA 0183 data protocol Built-in SuperCap to reserve system data for rapid satellite acquisition Built-in patch antenna. Super-cohesive magnetic for mounting on the car USB interface connection port. Waterproof and non-slip on the bottom. LED indicator for GPS fix or not fix. LED OFF: Receiver switch off LED ON: No fix, signal searching LED Flashing: Position fixed