The LEA-4A, 17 × 22 mm in size, is u-blox's GPS module, featuring the 16-channel ANTARIS 4 receiver technology developed jointly by Atmel and u-blox. The LEA-4A module uses 40% less power than its predecessor (the LEA-LA) and includes a USB port for flexible connectivity, high data rates and combined power and data transmission over one link. Inside the module, the ANTARIS 4 GPS engine provides good navigation performance in challenging conditions, a 4 Hz position update rate, DGPS and full SBAS (WAAS and EGNOS) support. The engine also supports active and passive antennas and offers antenna supervision that detects short circuits. All ANTARIS 4 GPS receivers are also endowed with Assisted GPS (A-GPS) functionality, which provides instant positioning upon request.