XT Series control panels can operate wirelessly and cordlessly with the PP1 power option. Even for applications with higher video alarm activity the batteries can last up to 2 years. With lower activity, the batteries can last up to 4 years. FeaturesApplication/Usage: Control PanelBattery Size: DBattery Chemistry: Lithium Thionyl Chloride (Li-SOCl2)Output Voltage: 3.6 V DCCompatibility: Videofied XT Series Control PanelsXTO-IP630, XT-IP630