Basic Butt Set with Caller Id Adapters Included RJ11 Connector Type RJ11 Data Safe Monitor No Dialing Method Tone Features 3 Types of Line Plugs Caller ID DTM and FSK Support Flash Button Last Number Redial On/Off Hangup Button IP Rating Not Rated Number of Digits 15 Testing Functions Line Monitoring Line Polarity Indication Display Screen Type Not Applicable Includes Carrying Pouch Handset Manufacturer Warranty Length 1 yr Waterproof No