Size:7.6*3.73*0.1~0.52cm      Dot-matrix: 7×15dots
1. Pixel: 7*21dots. 
2. Nine kinds of color.  
3. Letters, numbers and simple images stored.   
4. Hold up 6 messages in memory (Up to 1500 characters).
5. 9 speed and brightness levels. 
6. Support manual program with three onboard buttons.
7. 2pc of CR2032 batteries. more than 20 hours continuous battery life.