The device includes a pair of toroid magnets {HEAD ~ each} having {TAIL ~ a north pole} and a south pole 
The device includes a pair of toroid magnets { HEAD ~ each } having { TAIL ~ a north pole } and a south pole
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH