This headphone headset jack adapter will allow you to use your smartphone (iPhone and Android), gaming and PC / laptop headsets with 3.5mm plugs on your Panasonic cordless phones with 2.5mm jack. Compatible with Panasonic Bluetooth Cordless Phone KX-TG7875S Link2Cell with Enhanced Noise Reduction & Digital Answering Machine - 5 Handsets (Black/Silver) Panasonic Dect 6.0 Phones PANASONIC DECT 6.0 Expandable Cordless Phone System with Answering Machine and Call Blocking - 3 Handsets - KX-TGE433B (Black), 2 Handsets KX-TGE432B, 4 Handsets KX-TGE434B. PANASONIC Link2Cell Cordless Phone Bluetooth Enabled with Answering Machine and 2 Phone lines - 2 Cordless Handsets - KX-TG9542B NOTE: This cable is compatible only with the cordless phones specified in this listing.