Graupner MZ-10 5 Channel Transmitter Set HOPPING TELEMETRY TRANSMISSION 2.4 GHz technology with two-way telemetry, updatable firmware? The newest features always! Receiver included! Bind and model type indicator lights make setup for this beginner or trainer radio a breeze Real-time sensor data?GPS/altitude, temperature, voltage, current, RPM, current draw, and programmable aural announcement/warnings Powered by either four AA batteries (Pb/acid, NiCad) or optional NiMH battery pack? Three prong JR plug port in battery compartment Smart voice (Earphone) real time warnings w/ optional Bluetooth, range test, signal strength alarm? Works with mz, mx, and mc wireless "trainer mode"