Tech Research Line Voltage MonitorThis compact, easy to use Digital Monitor is made with advanced microelectronics and provides accurate testing and monitoring of electrical outlets and systems. Constantly monitors Voltage and frequency indicating potential improper polarity and ground wiring. The Digital Monitor's small size and rugged construction allows for convenient installation in an electrical outlet or use as a portable service tool.Features:Accurate Testing And Monitoring Of All AC Power Source TypesRMS Voltage And Frequency MeterMulti-Tone Fault Alarm. Hands-Free Auto ResetAdvanced MicroelectronicsOne-Button OperationSurge ProtectionLCD Display With LED BacklightLimited 90 Day WarrantyWeight: 1.0000Used For: Provide Accurate Testing And Monitoring Of Electrical Outlets And SystemsType: Plug In Wall SocketDisplay Type: DigitalControl Voltage: 85 To 150 Volts ACAmpere Rating: 0.02 Ampere