How to Control Your Box When It's Out of Sight (IR - RF Extenders) If your cable box or device isn’t in direct line of sight, and you can’t move it, you’ll need an IR-RF extender to transmit the signal. Recommended IR-RF Extenders: IR - RF radio frequency extender USB powered IR Extender HDMI powered IR Extender 3.5 mm Plug in IR Extender These devices have been available for decades, and setup may vary by model. Please follow the manufacturer’s instructions for the best results.