产品介绍：
Diagonal siz/inch: 4.2"
Resolution: 400x300
DPI Resolution:120
VA Zone size/mm: 84.86x63.6
Frame size/mm: 91x77x1.05
The main application:price tag,industrial control
Function Description:
1> Attractive/ fancy apperance,transparent acrylic shell with
crystal effect
2> 5.0 USB & DC 5.0V interface to connect the external power
supply（can be used together with power bank)
3> Can use lithium battery when no power supply outside
4> Small outline size,delicate and tiny,easy to carry and can put
into pocket
5> With a work light and buzzer, easy to use and user operate
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