Andoer DIY Multirotor Flight Controller Set Open Source APM2.6 2.6 & 6M GPS & 433mHz 3DR Radio Telemetry & OSD & Power Moudel for RC Ground Station Hobby Compare with APM 2.52: APM 2.6 without welding electronic compass on the mainboard, the board has no onboard compass. Antenna connectors: RP-SMA connector Output Power: 100mW (20dBm), adjustable between 1-20dBm Sensitivity: -117dBm sensitivity With fast satellite searching speed and high precision