1、100% brand new and high-quality. 2、High brightness nixie tube.The measuring result is clear at a glance,simple and free from worry. 3、Inflaming retarding shell.It adopts high strength inflaming retarding material,keep its shape at 100℃ and not burning below 750℃,safe and reliable. 4、Snap joint on the back.Suitable for 35mm standard guide rail. 5、Current 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.