Measures AC/DC voltage at 9 common levels up to 600V. Includes bright LEDs to indicate voltage reading without batteries. Permanently secured test leads. Vibration and sound alerts for dangerous voltage levels. Modern solid-state construction provides CAT IV 600V safety rating. Includes worklight to illuminate the work space. Audible continuity alerts at less than 270k. Includes 3 "AAA" batteries. ETL listed.