Today, I would like to introduce a product that can be used in daily life
This SM852B three-phase rotation tester is designed to check the phase sequence and show if the phase is open or not.
Features:
1.One Unit with two functions:Check the phase sequence and indicate the phase is open or not.
2.Safe and reliable:With alligator clips, easily involve the terminals of the control panel, guaranteeing reliability and safety.  
3.Wide voltage test:It can check 60V to 600V AC three-phase voltage,high performance.
4.Easy to use:With LED light to show if the phase is open or not,supports buzzer indication.  
5.Portable design:Small and light weight,with a carrying bag, convenient to take. 

Specifications:
Model:SM852B
Operation voltage:60V～600V AC three phase
Limit support voltage:2000V/minute (impulse voltage 4000V)
Operation frequency range:20Hz～400Hz
Limit time for continuous use:
60 minutes maximum at 60V AC
4 minutes maximum at 600V AC
Item Weight:135g 

More sourcing products , please check following link on wesbite.
https://www.jh-electronica.com/sourcing-products.html