SHONCO 4 Pcs Extended Rotatable Telephone Phone Cord Detangler Landline Telephone Accessory (Clear/Black) FITS Family Fixed Telephone- Works on RJ11 models of handset cords and handsets. Applies to Family Fixed Telephone ,And the item model is RJ11 Plug. Note : Not applies to VOIP phone , not fit for RJ45 Modular Plug. PREVENT FRUSTRATION - Stops your coiled phone cord from becoming twisted and tangled HIGH QUALITY & NO TOOLS REQUIRED - Includes gold- plated metal contacts to ensure great sound quality. Simply plug into your handset on one end, and the cord on the other end, and you are ready to go! Removal of the detangler is just as easy. ROTATES 360 DEGREES - Automatically rotates as you do while you are talking on the phone to extend the life of your phone cord Gold-plated metal contacts prevent loss of sound quality.