Instrument is supplied with 26-ES hammer electrode, extra #496 and #2497/A-100 contact pins and instructions in a hard carrying case. Features: Designed to check moisture levels in wood, concrete, EIFS, sheetrock, and other materials Resistance technology recognized around the world as the most accurate method for measuring moisture 6%-40% moisture range on wood 0.2%-50% moisture range on gypsum 0 to 100 relative scale for all other non-wood materials Digital readout Easy one-hand operation Includes (1) 9-Volt Battery Includes sturdy carrying case Proven microcontroller circuit One-year warranty Over fifty years of proven quality, accuracy and service 26ES Specifications: Two pins 1 1/16 penetration Use to measure moisture content in wood at different levels of penetration Ideal for shell and core tests to detect moisture gradients and to test lumber with wet surfaces