Features 1、SMALL SIZE Lightweight and portable, it does not take up extra space, can be easily used in various situations, and has high practicability. 2、HIGH ACCURACY Supports fast and accurate testing, it can meet high standard industrial measurements and has high safety. 3、PROFESSIONAL DESIGN It is used to detect the state of the open phase and the sequence of the phases, and can be applied to three phase alternating current measurement. 4、SOUND AND LIGHT INDICATION FUNCTION It indicates the order of the phases is indicated by light emitting diodes (LED) and buzzers. 5、SIMPLE OPERATION METHOD Equipped with a special test clip, you only need to insert the test clip on the metal probe of the test lead and tighten it, you can easily clamp it anywhere for measurement. Specification Item Type: 3 Phase Rotation Meter Model: SP8030 Material: ABS Purpose: It is suitable for three phase alternating current measurement. Operating Frequency Range: 20Hz-400Hz Limit Continuous Use Time: 60V AC: Up to 60 Minutes 600V AC: Up to 4 Minutes Package List 1 x Rotation Tester 3 x Clip 1 x Manual 1 x Portable Bag