33K views · 84 reactions | Fiddle Toy Colorful Flashing LED Lights Bat Fidget Spinner Only US$4.07 Use the code "RWFB2017"to get 12% OFF! Shop here:https://goo.gl/Kw5dcY More:https://goo.gl/VUxYkA Fashion style:https://goo.gl/II5sR5 Rosewholesale | Rosewholesale | Facebook

1.4M views · 14K reactions | This is a simple circuit of flashing LED lights with an optocoupler, the results are satisfactory #electronic #flashing #led #light #on #optocoupler #variation #assembly #tutorials #guide #solution #service | Herman Suhaemi | Facebook

17M views · 526 reactions | A perfect fit for Android phone. #FREE_Download! When the mobile phone calls, it can make the lights flashing, flashing rhythm can be set arbitrarily, the lack of light when there is no need to worry about missing important calls. Have a variety of colors of light, so that you no longer feel tired. | Sungy Mobile | Facebook

57K views · 235 reactions | [Warning: This video contains flashing...