Check the listing for details. ESI 24 Button Digital Feature Phone Key DFP Tested ESI Certified Tech 5000-0493. Condition: Seller refurbished. Listed at 35.00 USD. DescriptionThe ESI 24 Key digital feature features 12 programmable buttons in addition to a two line display. With features such as caller ID, speakerphone, call hold, call waiting, transfer, a help key, and a voicemail button, the 24 Key DFP is a powerful communication tool for any small / medium business or even as a deskphone in larger offices. The 24 Key DFP is a digital phone built for several ESI phone systems. The ESI 24 Key DFP makes an excellent phone for a desk user who needs access to several programmable keys, but does not need the large amount of keys offered by the larger ESI 48 Key DFP. The ESI 24 key DFP supports one touch button fixed keys for conferencing and transferring phone calls on the system.CompatibilityESI Communications Servers:ESI-1000ESI-600ESI-200ESI-100ESI-50IVX X-ClassIVX E-ClassIVX S-ClassIVX C-ClassThe parts sold by YourOfficePhone all require the correct phone system to operate, not just phone service. You cannot plug a phone into your house or home office without the exact phone system necessary to make the phone work. Not sure exactly what you need? Contact us and our friendly team will help you find the exact items you need. Warranty Our 90 day warranty covers normal use or if something is not working out of the box. We do not offer exchanges or returns for improper installation, improper usage, spilling fluids, dropping or throwing any part of the phone, or acts of God. Acts of God include lightning, fire, flood, power outages (surges), hurricanes, tornadoes, earthquakes, or any other natural occurrence. Returns We accept returns for any reason up to 30 days. About YourOfficePhone While the telecommunications industry is changing dramatically we are going to continue to stock the older, reliable telephones & spare parts for the foreseeable future. You may hear that the parts are no longer available but be assured they are. We have been in business since 2006 and stock thousands of telecom related parts. Contact Us Please use eBay messaging to contact us.