<https://vaptoday.com/shop/accessories/tools-accessories/coil-master-521-plus-tab/#product>
<http://schema.org/description>
"The Coil Master 521 Plus Tab is a totally redesigned and multi-functional device continuing the heritage of former versions of the world famous tab line, in order to dry burn your coil, test the battery output and voltage, as well as checking each coils resistance value. The tab is compatible to both single and dual battery mode."
<https://vaptoday.com/shop/accessories/tools-accessories/coil-master-521-plus-tab/>