Instrument Components : LCD、 Keyboard、 Power Switch、USB interface、Li Battery、Shell case .
Function is as follows :
Keyboard locted in bottom , it is used to input information .
Power Switch locaated in right side , it is used to control power fot instrument .
USBinterface located in top middle , it is used to charge for battery , battery located in bottom ofinstrument , used to supply power . Shell case is used to supply structural support .
Technical character :
1. Convenient to use .
2. It can test many crops .
3. small volume, full function, it can be storaged .
4. Database can be undated freely .
5. High power battery , 5V DVC， can be charged by USB interface on computer, too .