50 Centimeters position accuracy.Supper valley sation-keeping ability.Positioning 20 satellites in 6 seconds ata open ground.;GPS decoder chip:Radiolink M8N GPS,with u-box UBX-M8030(M8),72-channel,MMIC BGA715L7 from Infineon,is much better than single GNSS 7N;Double filter:SAWF(Surface acoustic wave filter) form Murata.Antenna:2.5dbi high gain and selectivity ceramic antenna.;Concurrent reception of GPS/QZSS L1 C/A,GLONASS L10F,BeiDou B1.;Compatible with PIX PX4 Pixhawk APM CC3D F3 flight controller