They are located on the Printed Circuit Board (PCB) relays and are internal to the block
Association Between Environmental Smoke Exposure in Early Life and ADHD-like Behaviors in Chinese Preschoolers: Findings from Population Survey in Shenzhen Yu-Liang Zhang, Wei-Kang Yang, Esben Strodl, Mao-Lin Zhang, Wei-Qing Chen Toxics 3
See More Reviews "Does what it says on the box" "The power supply is very small and light, and doesn't get overly hot during operation
Open and start puffn,,was the directions I got,,,took the rubber cap off and puffed and puffed,,,,didnt get no vapor or anything,,havent found no battery in this thing to turn anything on,,,my friend at work states his had vapor,,,but Ive gotten nothing out of this thing I bought,,may as well puff on nothing because I got no vapor,,no taste..nothing to even tell me the thing workedI can get more from puffn on a non lit cigratte from what I got from this..$6.99 threw down the drain