AAA type electronic battery igniter for glass tube commericial patio heaters (battery is not include) Open the red switch and insert one of AAA battery and connect your sparker and push directly Very easy to install on your heaters mounting size 18mm Also suitable for grill, stove , fire pit, fireplaces & other gas products Small size can save space, keep around 6mm distance of the sparker points to your burner hole; Range input voltage: DC1.5V; Battery specification: AAA