https://www.audioconcierge.co.uk/portfolio/dj44a-adapter/
DJ44A 2.5mm to 4.4mm High Quality Adapter - Audio Concierge
Eyeing on a 3.5mm jack but a 2.5mm plug earphone? With this adapter, you can easily use your 2.5mm balanced earphone on a device with 3.5mm headphone jack
high qualityadapter audio