Features:
 

• Practical and easy to operate
  Portable and light-weight
  Brand New LCD Monitor style  
  Best Quality 100% GUARANTEED
  Perfect companion for travel
  LCD Monitor Indicator display
  No power supply needed
  Accurately Test:   1.5v for AA, AAA, C, D, 9v
  Size:80x40x20mm
  Weight:30g
  
  Operation Instruction:
  Testing battery ,the LED lightning indicateds good condition.All the LCDs will lighting when checking Live wire,but off when checking Earth Wire/Naught Wire.