Grandstream DP720 – DECT Cordless VoIP Handset
The Grandstream DP720 is a DECT cordless HD handset meant to extend mobility across business environments while providing high-quality VoIP communication. It must be used with a compatible Grandstream DECT base station (like the DP750, DP752, or DP755) to operate.
Key Features
• Mobility: Users can move freely within wireless range — up to 300-350 m outdoors and ~50 m indoors depending on base station used.
• DECT Standard: Wireless telephony based on DECT for stable, interference-free audio. 
• HD Audio: Full HD voice quality on both handset and speakerphone with support for modern codecs (e.g., G.722).
• Multi-Account Support:
• Up to 10 SIP accounts and lines per handset (with DP750/DP752).
• Battery Life: Long standby and talk time (often 20 h talk / 250 h standby)