Supports a range of up to 400 meters outdoors (with DP755) and 50 meters indoors 1.8 inch (128x160) color TFT LCD with 2 programmable soft keys Offers 50-hour talk time and 500-hour standby time Supports up to 20 SIP accounts and 20 lines per handset as well as 3-way conferencing DECT authentication & encryption technology to protect calls & account Dedicated push-to-talk button Automated provisioning options include TR-069 and XML config files Use with Grandstream’s UCM series of IP PBXs for Zero Config provisioning HD audio to maximize audio quality and clarity; full duplex speakerphone پشتیبانی از 10 حساب SIP دارای دو کلید نرم افزاری قابل برنامه ریزی ارائه 20 ساعت مکالمه دارای کنفرانس صوتی سه طرفه دارای صدا HD بر روی بلندگو دارای دکمه push-to-talk