Diode Test: Yes, show approximate voltage drop On-off detection and buzzer function: Yes Battery capacity test: 9V Power supply: 12V 2x3A battery (not included) Product advantages: Mini ultra-thin, integrated design, compact and beautiful, easy to carry Name: Multimeter DT83B Security level: I : 200m-2000m-20-200-400V +/-0.5% AC voltage: 200-400V +/-1.0% DC current: 2000u-20m-200mA +/-1.8% Resistance: 200-2000-20k-200k-2000kohm +/-1.0% LCD display size: 35x14mm LCD maximum display value: 1999 Low voltage symbol: yes Overload protection: yes colour:Black Material:plastic size:102 x 60 x 24mm Package Contents: 1 x Digital Multimeter Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.