DECT Phone System Includes DB20 Base and D10 Handset. Supports Up to 20 DECT Cordless Handsets (Additional Handsets Sold Separately). Up to Simultaneous Calls. Up to 8-Hour Talk Time and 75-Hour Standby Time. Autoprovision with FreePBX and PBXact Phone Systems. TLS and SRTP Secure Encryption. Range: Up to 50m Indoors.