Tweet from PennNETS
RT @DetkinLab: Are you safe? Smile Mask uses an ultrasonic sensor to detect distance and translate it into a green smile or red frown. Desi… July 24, 2020, 8:21 pm
RT @DetkinLab: Are you safe? Smile Mask uses an ultrasonic sensor to detect distance and translate it into a green smile or red frown. Desi… July 24, 2020, 8:21 pm
