Features: Great use for Telephone RJ9 4P4C RJ11 Training Adapter for Headset or Handset splitter for office phones,call center / telephone marketing training;Easy setup, plug and for play. Type : RJ9/RJ11 Connector/ 4P4C standard. The gold plated leads for better data transmitting and higher signal strength. Novel and unique design, the rotating contact body is imported from overseas, small and exquisite, with it, you will no longer be troubled by the knotting of the telephone tube when making a call. The principle of this little Dongdong is very simple , The connection part will slowly rotate, so when the phone line is knotted, it will be restored to the original shape after the rotation! Specifications: Material:Plastic Length:Approx.7.2cm/2.83'' Color:Black,White Net Wedight:10g Note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Telephone Cord