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Simple to use- 1. Connect clamps to battery posts (red positive / black negative) 2. Hold load on for 10 seconds 3. Read meter with load button on Set Includes- Tester Heavy Duty Battery Clamps Carrying Handle Rubber Feet Easy to read colour coded voltmeter analogue display Tests both 6 and 12 volt batteries and charging system outputs. Tests 12v automotive batteries up to 1000CCA (cold cranking amps)