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 the office or at homeUniversally compatible coiled handset cord with all telephones manufacturers including AT&T, Cisco, NEC, Rolm, ITT, & Tie.You can use them as replacements for those and Avaya 5420 and 5610SW IP phonesThe cable detangler works on RJ11 models of handset cords and handsets. Applies to Family Fixed Telephone, the item model is RJ11 Plug.Automatically rotates 360 degrees to stop your coiled phone cord from becoming twisted and tangled with the phone line detangler.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 easyFor use between handset and telephone, not from telephone to wall plugTwisted cable with two crystal head and modular plug on both endsConnect telephone and extention to handsetsMake your phone call and reply more pleasant and convenientIf you are an Executive Assistant and was 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 get 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 cordDoes not affect the sound. People at the other end of the line hear you clearly and you hear whomever you are speaking to very clearly as well. It fit perfectly on your office phoneOur old phone had a twisted cord that impossible to correct. This detangler prevents it from twistingYou should give it a little spin,then the phone never tangles anymoreCompletely strong and durable,easy to install and replacecolour:blackMaterial:Copper foil wirePackage Contents:2x Phone Handset Cord2x Telephone Cord DetanglerNote : Not applies to VOIP phone , not fit for RJ45 Modular PlugOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.