Mitel ShoreTel BB424 Programmable Button Box for IP Phone 485G

The Mitel ShoreTel BB424 Programmable Button Box is a USB accessory for the IP485G IP phone and features 24 programmable tricolor LED buttons. It provides visibility over other users as well as single-button access to advanced telephony features including transfer, silent monitor and barge in. Users can also employ the four page buttons across the bottom to program up to 96 buttons total. This IP phone button box is hearing-aid compatible and has a 272 x 480 pixel backlit screen.