Took this with me on a trip through Egypt. It was a yellow coil, and didn't look like the advertised pic. I didn't unseal it until I was ready to use it. We were in areas where the mosquitos were light, and areas where mosquitos were very heavy. I transfered the band from my wrist, to ankle, to clipping it on my belt. It didn't keep the pests away; near the end of the trip I had about eleven bites on each leg. (Watch out travelers to SIWA-need to use something reliable as mosquitos are EXTREME there.)