The RCB-4H is an ultra-low power GPS receiver board featuring the ANTARIS 4 positioning engine with SuperSense Indoor GPS. It is the pin-compatible successor product of the RCB-LJ. The RCB-4H is equipped with a MCX/OSX RF connector and a 20-pin connector for power and digital I/O. The supported Assisted GPS (A-GPS) functionality provides fast time to first fix even in difficult signal conditions.