DP722
:1.8 inch (128x160) color LCD with 2 programmable soft keys
Offers 20 hours talk time and 250 hours standby time
Supports up to 10 SIP accounts and 10 lines per handset as well as 3-way conferencing
Push-to-talk via a configurable button
Seamless 1-touch door control with Grandstream's GDS series of Facility Access devices
HD audio on the speakerphone, handset, and headset jack
Software and firmware updates over-the-air