SonarPen at HKTDC Autumn electronic show
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Come visit the SonarPen booth at the #hktdc electronic fair and try out the SonarPen. 🖍➰📱 Booth CH-B07
![](https://www.greenbulb.com/wp-content/uploads/20191014_110147-e1572510410664-1024x499.jpg)