Models 3165 and 3166 Insulation Resistance Testers:

- Model 3165:

- DC Test Voltage: 500V
- Max. Effective Scale Value: 1000MΩ
- Mid-Scale Value: 20MΩ
- Accuracy for Measuring Range 1~500MΩ: ±5% reading
- Accuracy for Measuring Range 0.5/1000MΩ: ±10% reading

- Model 3166:
- DC Test Voltage: 1000V
- Max. Effective Scale Value: 2000MΩ
- Mid-Scale Value: 50MΩ
- Accuracy for Measuring Range 2~1000MΩ: ±5% reading
- Accuracy for Measuring Range 1/2000MΩ: ±10% reading

Features:
- Expanded megohm scale for enhanced readability.
- Durable housing case to prevent damage.
- AC voltmeter with clear scale for easy reading.
- Neck strap included for hands-free operation.

Specifications:
- AC Voltage Measurement: Up to 600V with an accuracy of ±3% of full scale value.
- Withstand Voltage: Can endure 3700V AC for one minute.
- Power Source: Four R6P (AA) batteries (1.5V each).
- Dimensions: 90(L) × 137(W) × 40(D) mm.
- Weight: Approximately 330g.

Accessories:
- Test leads (Model No.7025)
- Pouch for test leads (Model No.9067)
- Neck Strap
- R6P (AA) batteries ×4
- Instruction Manual

Country of Manufacture: Thailand