Feature: 1. Digital insulation resistance tester, with a 64x44mm LCD display, the maximum display is "1999". 2. Wide measuring range, with over‑range indication, only the highest digit displays "1" when over limit. 3. With data retention function, support test lock, stable performance and convenient operation. 4. Support automatic shutdown function (about 15 minutes after booting) to save battery power. 5. Suitable for insulation resistance testing of motors, cables, electromechanical equipment, telecommunications equipment, power facilities, etc. Specification: Condition: Brand New Item Type: Insulation Resistance Tester Material: ABS Display: 64x44mm LCD Display, Maximum Display "1999" Over-Range Indication: When the upper limit is exceeded, only the highest digit displays "1" Power Supply: 6x1.5V Dry Battery (Battery Not Included) Under-voltage indication when the voltage is insufficient Auto Power Off Function: About 15 minutes after power on Power Consumption: Test no-load power consumption