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Sony UTX-P40 Wireless Plug-On Transmitter UTX-P40/90 B&H Photo
Extreme Detail 5-Channel AirField RC P-40 1400MM Radio Control Warbird Plane ARF Receiver-Ready
Wltoys XKS A220-P40 RC Plane Remote Controlled Aircraft Fighter 4 Channel 2.4Ghz EPP Crash Resistant Easy Control for Beginners Great Gift Toy for Adults or Advanced Kids - Walmart.com
Sony UTX-P40 Wireless Plug-On Transmitter (UC14: 470 to 542 MHz)