Urhelper XB-866 Portable Digital Multimeter(Pocket Size) Auto Range DMM; Auto Power off Mini Size: 4.72in * 2.95in * 0.79in(L*W*H), easy enough to carry HUGE plus, two AAA batteries are needed but not included Included 7 functions: DCV; ACV; DCA; ACA; Ohm; Diode Test; Continutity Max.Voltage Between Terminals And Earth Ground; 600V DC or 500V AC