1100% brand new and high-quality. 2High brightness nixie tube.The measuring result is clear at a glance,simple and free from worry. 3Inflaming retarding shell.It adopts high strength inflaming retarding material,keep its shape at 100 and not burning below 750,safe and reliable. 4Snap joint on the back.Suitable for 35mm standard guide rail. 5Current mutual inductor.100A mutual inductor wire hole makes the installation easier. Features: 100% brand new and high-quality.High brightness nixie tube.The measuring result is clear at a glance,simple and free from worry.Inflaming retarding shell.It adopts high strength inflaming retarding material,keep its shape at 100 and not burning below 750,safe and reliable.Snap joint on the back.Suitable for 35mm standard guide rail.Current mutual inductor. 100A mutual inductor wire hole makes the installation easier.Specification: Measuring Voltage Range(Optional):AC 80~300V/200~450V Measuring Current Range:AC 0~100A(Mutual inductor is needed if larger) Power Source:Not needed Measuring Accuracy:0.5% Size:54*80*64mm/2.13*2.15*2.52in Installation Pattern: 35mm Guide Rail Installation Package List: 1*Meter Note:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.