Amplified bottom cable to fit the Avaya 6400 and 8400 telephones, the HIC 1 cable can be used on the handset port of the following models- Avaya 6402/6408/6416/6424/8403/8410/8434, it can also be used directly in the headset port of the following models - 6424 M/6416D M
2 year return warranty on headsets. End user to return any faulty product via the online After Sale Service option available at the support section of www.plantronet.com. Call 0800 410014 for further details