Please Note:

These are the Type 3 model that connects via 2.5mm Mini Din.

Connects Panasonic, AT&T, and other Brands and Telephones.

That is Model 1

No USB - That is Model 4

No Double 3.5PC - That is Model 2.

NOTE:

The 2.5mm plug is not the same as the size that goes into PC mic Jacks. Those are 3.5mm

Shipping is eBay Calculated