Features 1、Compact appearance, its appearance is exquisite and beautiful, lightweight and portable, and can be easily used in different situations. 2、Light reminder, it is equipped with 5 LED lights, the test results are clear at a glance, which can help you record and measure data. 3、Environmentally friendly design, it can be used without the use of batteries, without cumbersome battery replacement, and has higher practicability. 4、Using high quality materials, it is made of durable PC material, sturdy and stable, can protect important internal electronic components, and has a long service life. 5、Its continuous use time limit is 60 minutes at 60V AC and 4 minutes at 600V AC. You need to pay attention to the time when using it. Specification Item Type: 3 Phase Rotation Meter Material: PC Working Voltage: 60V-600V AC, Three-Phase Limit Support Voltage: 2000 V/Min Operating Frequency Range: 20 Hz-400 Hz Limitation Time for Continuous Use: It can be up to 60 minutes at 60V AC, and up to 4 minutes at 600V AC. Test Lead: Double Insulation Test Line Length: Approx. 70cm / 27.56in Package List 1 x Phase Rotation Meter 3 x Clip 1 x Manual 1 x Storage Bag