• The Polycom EM50 Expansion Module is easy to install and designed exclusively for the Polycom VVX 450 business IP phone. It’s an optimal solution for telephone attendants, receptionists, administrative staff and other power users who manage multiple workflows or simultaneous calls on a daily basis
    • Display - 5'in LCD WVGA (480x800 pixel) resolution
    • Line Keys - 30 multifunctional line keys
    • Daisy Chain - Up to two Expansion Modules
    • Compatible Phones - VVX 450
    • Power - Provided by Polycom VVX host phone
    • Warranty - 1 Year
  • Yealink EXP50

    With a 4.3-inch color screen, the Yealink EXP50 expansion module is intended to bring a fresh visual experience and an easy operating experience to you. Its new design for the Stand enables you to adjust between two lying angles easily even without disassembling it. To ensure a higher reliability of data transmission and a higher speed of data refresh, a USB cable is chosen to connect EXP50 expansion module to Yealink T5 Series IP phones.
    • Display - 4.3" 272x480-pixel color display with backlight
    • Line Keys - 20 physical keys, 40 additional keys through page switch
    • Daisy Chain - Supports up to 3 modules daisy-chain
    • Compatible Phones - SIP-T58V, SIP-T58A, SIP-T56A, SIP-T54S, SIP-T52S
    • Warrranty - 1 Year