The ACL Staticide ACL 350 Digital Static Locator is a non-contact meter that indicates electrostatic field voltage and polarity on charged surfaces. This easy-to-use instrument comes equipped with a Power On/Hold Button and a Zero button. The ACL Staticide ACL 350 Digital Static Locator automatically shuts off after approximately 90 seconds. Also The ACL Staticide ACL 350 Digital Static Locator grounding path is through its conductive case, so there is often no need to wear a grounded wrist strop during normal operations. The easy-to-read 3½ digit LCD display automatically updates three times per second. Measurements are dependent on the distance from the object being measured.