The GO 920/920T also comes equipped with Bluetooth technology for hands-free calling and PLUS services (PLUS services include fuel prices, real-time traffic updates, safety camera notification, customizable text-to-speech voices, points of interest, weather, audiobooks and more). Both receivers come with 4GB of internal flash memory, rechargeable five-hour lithium polymer batteries and a built-in FM transmittor. The 920T includes a RDS-TMC Traffic Receiver and a free year of service as well.