The BT Converse 1300 is fully PBX working, has 100 name and number memory, on-hook dialling, call timer, access code and secrecy. It also operates from battery power.Sennheiser CC 520 Binaural HeadsetPersonal standards at work demand professional means of communications. This binaural headset is specifically designed for Call Center use. Features such as Ultra Noise Canceling reduce ambient sound and make conversation clear and intelligible. Active anti-shock in ear pieces safeguards against acoustic shock and hearing impairment with prolonged use. Adjustable and pivotable microphone boom aids comfort and speech intelligibility. Small and light for absolute wearing comfort.