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Jh1003 100A 200A 400A High Precision Handheld Portable Contact Loop Resistance Tester. Lithium Battery Powered: Built-in 12.6V/7.8AH lithium battery for convenient portable operation. Customized Options: Customized type, accuracy grade, display, and weight available. One Year Warranty: Comprehensive 1-year warranty coverage for all mechanical defects. ISO9001 Certified: Manufacturing process certified under ISO9001 quality standards. Large LCD Display: High brightness LCD screen with full English menu and operation tips. Flexible Output Time: Adjustable output duration options: 1s, 3s, 10s, 30s, or 60s. Data Storage Capability: Stores up to 100 groups of measurement data for easy review.