Operate off of 12V external power supply (machine battery/charging system) Feature digital numerical readout, as well as a bar graph display Waterproof, rugged design Easy-to-read, clear vivid display Large buttons make changing functions easy, even when wearing gloves Feature a convenient clock Internal memory records peak readout Tachometer features adjustable sensitivity and updates every 0.3-0.6 seconds, with a range of 0-19,999 rpm Gauge body measures 78mm L x 40mm W x 20mm H. TACH DIGITAL 12V W/LED
