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ZBE502 is a telephone extension unit made by Schneider. It is a terminal for telephone systems offering 8 manual keys and 20 LCD keys which allow users to make and receive calls, as well as perform functions such as call forwarding, call waiting, call transfer and call pick up. This unit also offers a hands-free listening mode and it has an integrated speaker for making announcements. Additionally, the unit comes with an integrated microphone for making conversations. This unit is ideal for customer service centres, call centres and any office environment that requires a telephone extension.