Easy-to-read DIGITAL voltmeter and ammeter combine with the versatility of a carbon pile load to give a quick and precise determination of battery and charging system problems. Spring loaded to shut off automatically. This 0 to 600 Amp tester has unique curved discs to prevent hot spots. Heavy duty clamps with Flexi-Spring cable guards provide added value. MADE IN USA. Load: 600 AAmmeter Digital: 0-600 A Voltmeter: Digital Lcd 0-19.99 V Dc Leads: 5.5" 4 Awg Clamps: 500 A Limited Warranty: 1 Year Shipping Dimensions (Hxwxd): 11x19x14 Weight: 17 Lbs.