This receiver is my only choice when it comes to micro helis. The AR6100 is very small (19mm by 30mm by 9mm) and only weights 3.5 grams, it has very small/short antennas unlike the competition and uses DSM2™ technology that is compatible with any DSM2 aircraft radio and module system. In addition, the AR6100 can handle anywhere from 3.5 to 9 volts. 

 The AR6100 is a one-of-a-kind receiver for small applications, such as a T-Rex 450 or a GAUI EP200.