Supreme IIS 8-Channel FM AS Dual Conversion Rx Auto Shift Hit/Fut/JR/AirZ 8 Channel FM receiver with Crystal Auto Shift Dual Conversion Ultra Narrow Band Size: 51X32X20mm Weight: 28.5g (1.00oz) Channel Output & Crystal Type: Vertical Type Low Voltage Operation Power Indicator Light For Use With All 72MHz Transmitter Must Use Hitec Dual Conversion Crystal