Test Set, Adapters Included ABN, Connector Type ABN, Data Safe Monitor Yes, Dialing Method Pulse, Tone, Features 20-Foot Drop Safe, Number of Digits 18, Testing Functions Line Monitoring, Auto Power Off Yes, Battery Chemistry Lithium, Battery Size 3V, 9V, Maximum Operating Humidity 95 Percent, Maximum Operating Temperature 140 Degrees F, Minimum Operating Temperature 29 Degrees F, Waterproof Yes