In car wireless IR headphone

Dual-source with adjustable headband
A/B source selector switch - A source: 2.3MHz (L), 2.8MHz (R) 
                                                 - B source: 3.2MHz (L), 3.8MHz (R)
Twin receiving diodes in each earpiece for 360°capture of IR signal
Personal volume control
Effective rage (maximum) up to 10 meters
Slid On/Off switch with red LED status light
Compatible with all in-Vehicle AV applications
Auto mute & auto power off after approximately 35 minutes when preserver battery receives no signal
Cone impedance: 32 ohm±15%
Battery life: about 48 hours