The phone cable is good to long-distance communication for your desk phone or office phone .Extended length coiled cord is provided Extra Length for working in or at home Universally compatible coiled handset cord with all telephones manufacturers including , , , Rolm, ITT, & Tie.You can use as replacements for those and 5420 and 5610SW IP phones The cable detangler works on RJ11 models of handset and handsets. Applies to Fixed Telephone, the item model is RJ11 Plug. Automatically rotates to stop your coiled phone cord from becoming and tangled with the phone detangler.Includes gold- plated metal contacts to great sound . Simply plug into your handset on one end, and the cord on the other end, and you are to go! Removal of the detangler is just as easy For use between handset and telephone, not from telephone to wall plug cable with two crystal head and modular plug on both ends Connect telephone and extention to handsets Make your phone call and reply more pleasant and convenient If you are an Executive Assistant and getting frustrated with your cord always getting tangled. If you use the phone 80% of the time to make and answer calls. So we figured you would this affordable combination of useful handset cord and Very important for your job and it makes you more productive and more efficient with not constantly having to fix a cord Does not affect the sound. People at the other end of the hear you clearly and you hear whomever you are speaking to very clearly as . It fit perfectly on your office phone old phone had a cord impossible to . This detangler prevents it from twisting You should give it a little spin,then the phone never tangles anymore Completely strong and durable,easy to install and replace colour:black Material:Copper foil wire Package Contents: 2x Phone Handset Cord 2x Telephone Cord Detangler Note : Not applies to VOIP phone , not fit for RJ45 Modular Plug Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.