Test Set, Adapters Included ABN, Connector Type ABN, Data Safe Monitor Yes, Dialing Method Pulse, Tone, Features Amplified Speakers for Hands-Free Monitoring, Caller ID with Call Waiting, Data Lockout Protection, IP Rating Not Applicable, Number of Digits 23, Testing Functions Continuity Testing, Tone Generator, Auto Power Off Yes, Battery Chemistry Alkaline, Lithium, Battery Size 9V, Display Screen Type LCD, Display Type Digital, Includes Batteries Yes, Maximum Operating Humidity 95 Percent