... 1) Type: SR-74101R , (2)Name: digital voltage testing pen, (3)Features: 12-250v AC ... display ways (1) Type: SR-74101R , (2)Name: digital voltage testing pen, (3)Features: 12-250v AC test ... 20000 times, (4)Packing:1000pcs(50pcsx20boxes)/ctnOur factory manufactures wall switch, socket, plug, extension socket, adaptor, lamp holder, ... to your requirement. OEM orders are welcome. Digital Test Pen (SR-74101R)