M3900技术参数：

 DCV: 200m-2-20-200-1000V                               ±0.5%
ACV: 200m-2-20-200-700V                                ±1.2 %
DCA: 20u-200u-2m-20m-200m-2-20A                        ±1.0 %
ACA: 20u-200u-2m-20m-200m-2-20A                        ±1.0 %
OHM: 200-2K-20K-200K-2M-20MΩ                        ±0.8% 
Diode Test:  yes
Continuity Buzzer:  yes
Transistor Test:  yes
Power: 9V Battery
Size: 172 x 88 x 36mm
Weight: Around 184g
Packing: Gift box
Standard Quantity Per Carton:  40
Standard Carton Size:  50 x 33 x 39.5cm
Standard Carton Gross Weight:  18kg