At the core of the system is a compact RF transmitter module that broadcasts at 900 MHz using FM modulation. It connects easily to two stereo audio inputs and transmits sound wirelessly to compatible RF headphones across a 100-foot range. No need for line-of-sight like IR systems—this RF unit can be mounted behind panels, under seats, or in the trunk and still deliver uninterrupted audio. Each HP-902RFT headphone features an adjustable over-ear swivel design for enhanced comfort and passive noise isolation. Individual controls for volume and channel selection allow each listener to choose the right source and level independently of the others. A 3.5mm auxiliary input on each unit adds versatility, enabling wired playback from smartphones or MP3 players without using an RF signal. To conserve battery life, the headphones feature an on/off switch, auto power-off, and auto-mute functionality. Power is supplied by two AAA batteries per headphone, making them easy to replace and manage without the need for cables or charging docks. The complete system is stored and protected in a durable EVA hard-shell carry case, ideal for keeping everything organized in a vehicle or during travel. For families with multiple passengers or larger vehicles, additional compatible headphones, such as the HP-900S, can be added without causing configuration conflicts. Key Features900 MHz RF Wireless Transmitter (FM Modulation)Dual Audio Input Channels (Stereo RCA)100 Ft Operating Range (No Line-of-Sight Required)Over-Ear Swivel Headphones with Adjustable FitIndependent Channel Selector + Volume Control3.5mm AUX Input for Direct MP3/Phone ConnectionAuto Power-Off & Auto Mute FunctionsALC (Auto Level Control)Includes EVA Hard Carry CaseBattery-Powered (2× AAA per Headphone)Add-On Compatible: HP‑900