5 color: Green, blue, purple, gray, pink

- Reliable accuracy and durability
- Two Color OLED Display, four display modes.
- 4-Direction Display adjustable.
- Low voltage indicator, Real-time spot-checks.
- Low power consumption,50 hours continuous to work.
- Low Perfusion ≤0.4%
- Automatic power off when no signal
- Small and light weight, convenient to carry
- 2 AAA alkaline batteries