Rechargeable Battery: Powered by three removable 3.7V 14500 batteries with chargers compatibility, offering extended use and power cycling for long term reliability Clear Backlit LCD Display: Features a large backlit screen for easy reading in both bright and dim environments, ensuring visibility during on site inspections and repairs Wide Ranges Temperature Detections: Measures temperatures from 20℃ to 1000℃ (4℉~1832℉) with included thermocouple, ideal for direct testing in labs, homes, or industrial settings High Precisions Insulation Testing: Professional 1000V megohmmeter provides accurate insulation resistance measurements, solving traditional meter inaccuracies for safe high voltages equipment inspections by electricians Multifunctional 2 in 1 Design: Combines insulation resistance testing with standard multimeter functions including voltages, resistance, and continuity checks for versatile electrical diagnostics, Manufacturer: ZEPFJHE