This is the best way to begin with energydots. The duo pack includes a self-adhesive bioDOT and a self-adhesive smartDOT. Wear the bioDOT, which works to strengthen and support your energy field. Affix smartDOT to your wireless device, it is designed to retune EMF radiation to a safer level for the body to absorb. The two are reported to bring fewer headaches, greater sleep, better concentration and improved energy levels. This combination pack includes a bioDOT to wear and a smartDOT for one of your devices. We recommend using the smartDOT on your mobile phone as that is the device you carry with you most often. BioDOT has an energising effect with an element of relaxation and smartDOT has a stress-reducing physiological effect. In a customer survey overall 67% found they had improved focus and concentration since using bioDOT & smartDOT (105 out of 156).