Calian's HCS885XF Helical Smart Helical Antenna SDK is a multi-band (L1/L5), multi-constellation integrated GNSS receiver/antenna for handheld devices, robots, and drones. It integrates u-blox' NEO-F9P receiver and is compatible with Skylark Cx and Nx RTK. It comes with the TruPrecison SDK application, which provides an NTRIP connection to stream Skylark corrections to the Smart Antenna via RS-232 or CMOS, depending on the variant.