Usmile Beitian Dual Module BN-880 GPS Module with Built-in HMC5883L Compass for Apm pixhawk NAZE32 CX-20 Walkera QR X350 PRO and Other Mid-Sized Quad Quick satellite searching,No more sitting and waiting for GPS locked, Few second and your quad good to go Uses 2 GPS Systems (GPS and Glonass) at the same time to increase accuracy and very fast lock, Note that by default the module is configured only for UBX protocol, so not any flight controllers will work. But it is not a problem as you can configure the module using u-center for NMEA protocol and any baud rate so theoretically this module is compatible with all controllers. Easy to setup, very fast lock, good quality for the money A great update for CX-20 or Walkera QR X350 PRO and other mid-sized quad, lock much more satellites and much more stable Built-in HMC5883L compass, Weight:10g. If you need this GPS with case, check https://www.amazon.com/dp/B01EH3819W