Foldable design Infrared wireless stereo headphone (Dual Channel)Carrier frequency: 2.8MHz (right); 2.3 MHz (left)Compatible with all vehicle AV applications Auto mute Comfortable wearing with adjustable headband Personal volume control Effective range up to 8 meters S/N ratio: ≥60dB Speaker:Power supply: Requires 2xAAA (1.5V) batteries
