Available in two sizes: 0.5 A / 7 Ah and 0.5 A / 14 Ah Temperature compensated charging to maximize battery life Designed to blend in with VESDA detectors Knockouts designed to line up with VESDA units External LED indication on 220U Internal LED indication on 215U Relay outputs for connection to the general-purpose input. 110 / 230 Vac fi eld selectable