Product use: suitable for home or office fixed wired telephone, compatible with standard RJ9, RJ10, RJ22 telephone line, can also be used for personal computer. Product features: the shell is made of high-quality PE material, good wear resistance, long service life, ABS material is used for insertion material, good durability, and provides better use experience. Product size: overall length 7cm/2.75inch, cable length 3cm/1.18inch. Compatible devices: landline phone, personal computer. Product type: telephone handset cable swivel head, telephone handle wire anti-winding head, transparent black band wire anti-winding head.