Model Number: KX-TG4323Frequency: 5.8 GHz System: FHSS Channels: 89 Phone lines: 1 Handset expandability: 4 handsets Display (handset): 1.4-inch LCD with backlit 16 digits x 3 lines Handset speakerphone: Yes Handset speakerphone volume: 6 steps Intercom between handsets: Yes Intercom between handsets and base unit: Yes Conference call: 4-way (3 handsets and line) Phonebook directory: 50 items (16 characters/32 digits) Caller ID/call waiting: Yes Caller ID history: 50 items Any key answer: Yes Talk volume (handset): 3 steps Ringer tones (handset): 3 tones and 4 melody Ringer tones (base): 1 tone Ringer volume control: Base unit Redial memory: 5 numbers Pause: 3.5 seconds Answering system: Digital Voicemail waiting indicator: Yes Recording time: 12 minutes Page/handset locator: Yes Battery: 2 x AAA Ni-MH batteries Battery charging time: 7 hours Battery life: Up to 5 hours (talk) up to 11 days (standby) Menu languages: English Spanish Voice prompt languages: English Spanish Wall mountable: Yes