Singapore Inventors' Development Association (SIDA) 新加坡发明协会
SIDA website migration completed
SoundBrake: Awareness device for headphones
Jul 30
Click here for YouTube link
https://www.youtube.com/watch?v=D7AlDV4qaxA
Recommended by Jason
Search: elevator, home, 家庭, 電梯
20170730A2_HomeElevator