2x Portable D-Shape Earphone 3.5mm Listen Only Earpiece Headset fits Radio 1 Pin

No PTT or microphone: No PTT or microphone, this is for listening only. - Single pin 3.5mm plug: with one pin 3.5mm jack for any ear. Speaker size: 19mm. Style: ear hook. - Extraordinary comfort: Fits the outside of the ear, providing extraordinary comfort.

eBay