Convert 3.5mm Smartphone plug to single RJ9 handset plugSave money by buying a smartphone headset, or using your existing one with your phone's handset jack
The adapter outputs binaural sound for stereo headsets, meaning you will hear sound out of both ears
This amazing adapter converts the standard 3.5mm smartphone plug to RJ9 handset plug, allowing you to use your favorite smartphone headset with your Aastra office phone
