This meter is made Mastech, and Sinometer branded it, but some of them you receive it may be in Mastech Brand too. It is in High quality and brand new in Mastech Box. Auto-ranging multimeter with high resolution and good accuracy Automatic power-off, Max value hold, data hold, back lit,manually range selection Handheld size with back tilt stand What's in the Box: MS8221 Test leads Batteries Thermocouple Multifunctional test socket User Manual Specifications: DCV: 0-200mV-2V-20V-200V-600V, ±0.7%, input impedance: 10 M Ohms ACV: 0-200mV-2V-20V-200V-600V, ±0.7%, input impedance: 10 M OhmsDCA: 200uA-2000uA-200mA-2.0A-10.00A±2.0%ACA: 200uA-2000uA-200mA-2.0A-10.00A±3.0%R: 0-200-2k-20k-200k-2M-20M±1.0%Temperature: -20ºC- 0ºC; 0ºC- 400ºC; 400ºC - 1000ºC; 0ºF - 50º F; 50º F- 750º F;750º F- 1800º F, C/ F selectableBattery Tester: It checks the batteries with a built-in load: for the batteries voltages of 1.5V/ 3.0V/9.0V; (Load current: 1.5V/50mA,3V/30mA,9V/1mA)Audible continuity: