Blue Sea 7930 Contura II Switch SPST Black OFF (ON) Night vision 000 entries Call history up Road Safety 000 entries Call history up to 200 entries XML LDAP remote phonebook Do Not Disturb (DND) 3 way local conference N way network conference External Internal call transfer between DECT phones Intercom between DECT phones1 Mute Redial Call transfer: blind attended Call hold Call forwarding: per line basis (busy always no answer) Call timer (call duration) Caller ID Phonebook matching (incoming and outgoing calls) Multi language support Keypad lock 36 hours 7 hours standby time talk time Included AC Adapter Deskset battery: 2 Run Time: High:16H thermoshock WARNING: This product can expose you to chemicals including di(2 ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer