Features:
 
1. Product dual color OLED display,can show the six different display mode in 4 directions.
2. One button to operate.
3. Low-power consumption, work with the 2 pieces AAA alkaline battery.
4. Battery power indicator.
5. The device will automatically power off in 8 seconds if there is no finger signal.
6. Alarm Setting.
7.1-4 levels of brightness can be adjusted.
8.Small in volume, light in weight, and convenient to carry.