The new SR4S remote control is the basis for every model fan who prefers to operate a joystick rather than reach for the steering wheel and is also the successor to our incredibly popular ""SR2S"" 2-channel stick remote control. The lighter and slimmer design ensures that your hands won't get tired even on longer trips. In addition, the 6V (4* AA) operating voltage reduces the functional weight by 40%! Equipped with the following standard functions: Servo Reverse (the direction of rotation/switching of the individual channels can be changed using this function) Trim-Function for throttle and steering (setting the throttle neutral position and straight-ahead running) ST. D/R Function for setting the servo travel limit (steering servo only) There are also channels 3 & 4 for free assignment, which can be operated via 2 toggle switches. Radio Specification: 4 channel Frequency: 2.4GHz Protocol: AFHDS 2A Operating voltage: 6V DC (4* 1.5V AA Mignon) Low V Alarm: below 4.2V Temperature: 0°C - +60°C Weight: 320g Dimensions: 190*174*89mm Receiver Specification: 2020012 - 4 channel mini receiver Frequency: 2.4GHz Protocol: AFHDS 2A Waterproof: Yes Operating voltage: 4.8V-7.4V Dimmensions: 35x30x13mm Weight: 15g Aerial length: 260mm Scope of delivery: SR4S radio R4WP receiver Bind plug Aerial tube Manual (AB2000022)