Single Ear Design: The heads are monophonic. Monaural Head Air Tube In Ear Anti-radiation Stereo Ear for Wireless Bluetooth.Acoustic air tube design, uses the principle of air conduction acoustic tube, so that radiation away from vulnerable brain.
Plantronics H101 Encore Binaural On-Ear Voice Tube Office Headset
3 Pair Two Way Radio Ear Mold Earpiece Earbuds Insert Coil Tube Equipment Part
Wired In-Ear Headsets,Audio-Visual Air Tube Security Earpiece with 3.5mm jack...
New 3.5mm Air Tube Anti-radiation Stereo In-Ear Single Headset Earphone With Mic
FC12 Stereo Music Headset Air Tube 3.5Mm Anti-Radiation Earphone In-Ear Headphon
