Now Playing: Canon goes all digital

Now Playing: Consumer Reports changes its position Tesla Model 3

Now Playing: Woman sued after posting a 1-star Yelp review

Now Playing: Uber launches panic button to help riders

Now Playing: Russia linked malware attack on routers

Now Playing: Google Home outsells Amazon Echo

Now Playing: Alexa sends family's private conversation to random contact

Now Playing: Top gadgets for emergencies

Now Playing: New accusations against Facebook

Now Playing: Amazon responds to story that Echo sent private talk to random contact

Now Playing: University of Central Florida develops LED fabric

Now Playing: How to charge your phone faster

Now Playing: Twitter users blocked by Trump may soon get a reprieve

Now Playing: Apple refunds customers who purchased battery replacements

Now Playing: Concerns grow over Amazon's facial-recognition software

Now Playing: Siri gets a new voice

Now Playing: Headphone company Ossic goes out of business

Now Playing: Elon Musk holds rare town hall to discuss LA tunnel

Now Playing: Amazon Prime set to increase its annual membership fee by $10

Now Playing: YouTube Music launches revamped version