This is the Graupner 2.4GHz mz-12 12-Channel HoTT Transmitter (only transmitter without receiver) FEATURES: Skims 75 channels using the HoTT (Hopping Telemetry Transmission) system to ensure the safest link between transmitter and receiver Integrated telemetry display with 128x64 LCD Smart voice announcement system (earphone and buzzer) Real-time telemetry analysis for Optional Brushless Control telemetry ESC such as RPM, voltage, consumption current, temperature, warning Graupner Firmware update through GR STUDIO PC Software SUMD, SUMO Functions ensures the convenient use of peripherals by gyro and control board Helicopter Functions; Q.link function 6 swash plate types (1 Servo, 2 Servo 180, 3 Servo 120, 3 Servo 140, 3 Servo (Elevator), 4 Servo 90) Pitch curves (5-point) Heli mix function (Pitch-thro, Pitch-rudd, Elev-thro, Gyro, Swash Limit, Governor, Governor Rate Swash mix function Five program mixes Airplane, Glider Functions; Two Q link functions Three Q link trim functions 4 wing type 4 tail types Wing MIX function (diff aile, aile>>rudd, elev>>flap, flap>>elev, elev>>aile, flap>>aile) Programming options include; 20 Model Memory 2 Q-Link Functions 2 Model Types (Helicopter, Airplane) Selectable signal repetition time Wired and wireless trainer system 3.6V to 8.4V operating voltage Two year limited warranty beginning at date of purchase INCLUDES Graupner 2.4GHz mz-12 6-Channel HoTT Transmitter GR-16L Receiver 4-Cell Battery Holder, Neckstrap and Manual REQUIREMENTS Servos of modeler's choice SPECIFICATIONS Channels: 6 Frequencies: 2.4-2.48GHz Modulation: FHSS Display: LED trainer system Current Consumption: 250.0mA approximate Controller: 32bit micro controller Radio Frequency Band: 2.4000-2.4835 GHz Radio Modulation: FHSS Temperature Range: 50 - 131°F (-10 - +55°C) Antenna: Dipole Display: 128x64 mono LCD Telemetry Function: Internal LCD, external smart box Telemetry Announce: Earphone output Toggle Switch: 5 Volume Knob: 1 UI Interface: Tact s/w Quick Link: 2 Model Memory: 20 Firmware Upgrade: External USB device Trainer Function: Wired/Wireless Dimensions: 7.22 x 10.18 x 3.76" (183.6 x 258.7x 95.9mm) Weight: 20.12oz (570.4g)