* light lithium packs fit all models of Lenz heat socks, lenz heat vest, heat bandage 1.0, heat glove 4.0 and LED system 1.0 * attach lithium pack via press studs * heat can be regulated via 3 settings on the lithium pack | Article: Lenz Lithium Pack RcB 1200 Accupack | Article: Lenz Lithium Pack RcB 1200 Accupack