MAIN MODULE ONLY, it is sold as pictured, please STUDY MY ACTUAL PICTURES of this item NOT THAT GENERIC STOCK ONE. Do your research before buying to be sure it's what you need, there is a restocking fee for my items. If you have any questions, please contact me BEFORE buying, a signature will be required at time of delivery. Thanks Additional Details ------------------------------ Product description: Description: ? - Grandstream Expansion Module - Delivers Additional Functionality, Versatility And Flexibility To Grandstream's Gxp2020 And Gxp2010 Enterprise Ip Phone Series - Ideal Solution For Offices That Manage High Call Volumes Or An Office Receptionist - 56 Programmable Buttons (Each With Dual Color Led) And Up To 112 Programmable Buttons When Two Extension Modules Are Daisy Chained Together - Supports For Traditional Call Features On Each Of Its Programmable Buttons, Including Blf (Busy Lamp Field), Conference/Call Transfer/Forward/Pick Up - 56 Programmable Buttons Per Module - Busy Lamp Field (Blf) - Speed Dial For Each Line - Daisy-Chain 2 Modules For 112 Programmable Buttons - Conference/Call Transfer/Forward/Pickup Gsgxp2020ext