Test Set, Adapters Included ABN, Connector Type ABN/PP, Data Safe Monitor Yes, Dialing Method Pulse, Tone, Features Data Lockout Protection, DSL/POTS Filtering, Last Number Redial, Mute Function, Polarity Function, Speed Dial Memory, Two-Way Speakerphone, IP Rating IP43, Number of Digits 23, Testing Functions Milliamp Detection, Backlit Digital Display Yes, Battery Chemistry Alkaline, Battery Size 9V, CAT Safety Rating CAT I, Display Screen Type LCD with Backlight, Display Type Digital