IGT1058 Features: * This pocket sized voltmeter is small, portable and easy to use * Tests multiple battery types, including Conventional, Maintenance Free, AGM, Gel Cell, Marine and Deep Cycle batteries * Bright 4 digit LED display is great for bright or low light settings Specifications: * Operating Range: 4.5V - 20V * Solar 6/12 Volt Digital Voltmeter Warranty: * Safety features include reverse polarity and over-voltage protectionThis digital voltmeter comes with a one year limited warranty. * 1 yr warranty on material and workmanship