At only 4.4 grams and 19.0 x 40.0 x 9.0mm (WxLxH), the AR6100E is the ultimate 2.4GHz receiver for most any small electric model from mini profile foamies to 400 class helis. Because it uses advanced DSM2™ technology, it is only compatible with DSM2 aircraft radio and module systems. It also boasts a wide input range that allows it to operate with 3.5- to 9.6-volt electrical systems.