This is the Hitec Aggressor SRX Pro 3-Channel 2.4GHz DSSS Surface Radio System with Atom Micro 3 Receiver (Servos Not Included). FEATURES: 2.4GHz Direct Sequence Spread Spectrum (DSSS) and FM (PPM) ready 7msec high response mode Ten model memory, four character naming Brake ATL switch and brake level travel limiter Dual mode 3rd channel (shift or linear) Steering wheel tension adjust Transmitter charge jack Programmable features include; Two speed menu scrolling Steering Dual Rate Steering and Throttle Exponential Rates End Point Adjustments Idle Up Adjustable Steering, Brake and Acceleration Rates Sub Trims for Quick and Easy Set-up Timer Servo Reverse Atom 3-channel DSSS micro surface receiver (HRCL4000) INCLUDES: Hitec Aggressor SRX Pro 3-ch Transmitter, Atom 3-ch Surface Receiver, Spectra Module, four AA Battery holder, On/Off Switch and Instruction Manual REQUIRES: AA Cells: Eight for transmitter Servos of modeler"s choice SPECS: Specs for transmitter not provided by manufacturer Receiver: Size: 1.22 x 0.75 x 0.47" (31 x 19 x 12mm) Weight: 0.24oz (6.8g) Current Consumption: 40mA Operating Voltage: 4.8 - 7.4V jxs 01/03/10 ir/jxs