Teeth whitening used to be uncomfortable procedure at the dentist but it is 2015 now and we have other ways to make your teeth whiter. This one looks like it is from some Arnold Schwarzenegger sci-fi movie or Saw franchise but it is actually just harmless Next Generation LED light with whitening gel for five – twenty minute sessions. It will kill the germs and remove years of stains that are caused by coffee, red wine and smoking and whiten your teeth by 6 to 8 shades! As most of the latest tech it is simply rechargeable via USB. Don’t buy any of that Home Shopping Chanel crap, this one is much better,e read the reviews.