This is the 2.4GHz S-FHSS Futaba 4PL 4-Channel Surface Radio System. Transmitter and R2104GF Receiver only, servos not included. FEATURES: Selectable between the high 6.8ms frame rate of the S-FHSS mode for use with the included receiver, or FHSS mode for use with R603GF or R2004GF receivers In addition to a faster frame rate which results in faster response, S-FHSS also offers fail-safe on all channels Forty model memory and 10 character naming Throttle fail-safe on FHSS mode MC Link (connecting to Futaba ESCs) 4WS/Dual ESC/Boat/Brake Mixing Mechanical ATL, ABS braking and throttle acceleration Backlit 128x64 LCD with adjustable contrast Timer functions include Up, Down and Lap timer, Lap Memory up to 100 Laps and Total Laps Third Channel Functions; Reverse Sub Trim Step Brake EPA (high/low) A.B.S. Throttle Functions; Trim Sub Trim Trim Rate A.B.S Reverse Idle-Up EPA (high/low) Acceleration ATL Preset (throttle hold) Mechanical ATL Speed Exponential (high/low) Servo Neutral Select Steering Functions; Trim EPA (left/right) Trim Rate Exponential Reverse Sub Trim Dual Rate Speed Turn/Return Fourth Channel Functions; Reverse Brake EPA (high/low) ABS Sub Trim Other Mixing Functions; One Program Mixing Brake Mixing 4WS Mixing Special Mixing for Dual ESC Setup One year limited warranty through Hobby Services beginning at date of purchase INCLUDES: Transmitter R2104GF 2.4G S-FHSS Receiver, FUTL7616 On/Off Switch and Instruction Manual REQUIRES: AA Cells: Four for transmitter Servos of modeler"s choice SPECS: Receiver; Voltage: 3.5V-8.4V Dimensions: 1.54 x 1.02 x 0.39" (39 x 26 x 10mm) COMMENTS: If wanting a LiFe battery for the transmitter, the Hobbico LiFe 6.6V 1900mAh 2 Cell Battery Pack (HCAM6520) is an ideal choice. WHILE THIS TRANSMITTER COMES WITH A CHARGE PLUG BUILT IN, IT CANNOT BE USED UNLESS YOU USE PART NUMBER HSP29615 AND A CHARGER THAT CAN HAVE THE CHARGE CURRENT ADJUSTED TO 4.8 VOLTS AT 200 MAH. jxs 12/01/10 ir/jxs updt 12/23/10 updt jxs 12/05/11