... .6F22 9V battery inside 2.DRB-503 can detect car lamp halogen bulb, G4, G5, G5.5, GY6.35, G13, MR11, MR16 ... : 1.6F22 9V battery inside2.DRB-503 can detect car lamp halogen bulb, G4, G5, G5.5, GY6.35, G13, MR11, MR16 ... )DRB-503A9V110x64x40475x400x23010012/10 best quality light tester DRB-503A, factory, ISO9002, CE,ROHS