Technical Information IP Phone Technology: VoIP Wireless Technology: DECT Wireless Operating Distance: 984.25 ft Total Number of Phone Lines: 1 Ring Tone Type: Polyphonic Dialer Type: Keypad Maximum Cordless Handset Supported: 9 Caller ID: Yes Speakerphone: Yes Features: Alarm Do Not Disturb Setting Date and Time Local Video Control Call Log Phone Book Menu Operations Hands-free Auto-answer Music on Hold Call on Hold Call Transfer Message Waiting LED Missed Call Indicator Intercom Speed Dial Calculator Voice Codec: G.711 G.722 G.726 G.729 Display & Graphics Screen Type: LCD Display Color: Color Color Supported: 65556 Colors Screen Resolution: 128 x 128 Interfaces/Ports USB: Yes Headset Port: Yes Management & Protocols Communication Protocols: LDAP SIP SRTP STUN NAT LLDP Controls/Indicators Buttons & Keys Type: Navigation Volume Control Mute Reset Battery Information Battery Chemistry: Lithium Ion (Li-Ion) Battery Standby Time: 100 Hour Power Description Input Voltage: 5.9 V DC Warranty Limited Warranty: 1 Year