This is Futaba 6 channel Mini PCM 40MHz reciever. This works with the 6EXA Super but will also work with any 72MHz Futaba transmitter with PCM. FEATURES: Narrow band spacing and single conversion signal filtering combined to provide exceptionally clear reception and smooth accurate control Small size and light weight INCLUDES: One R146IP Micro 6 channel 40MHz PCM 1024 Receiver REQUIRES: Futaba receiver crystal SPECS: Length: 28.7mm (1.12") Width: 42.7mm (1.68") Height: 20mm (.079") Weight: 16.5 grams (.58 ounces) Receiving range: 300 meters (984 feet) Power requirement: 4.8 volt-6 volts. Antenna length: 27"