Featuring uninterruptable power, light sensing mode detection, D cell battery back-up system and constant power technology. CP1900 & CP900: Mains or battery powered. (Mains adaptor purchased separately). Adjustable pulse power settings. Powered by 12v with internal D cell back-up. Audible beep when battery low. Solar ready. CP1900 - (1.86-1.04J). Powers up to 14km. CP900 - (0.86-0.43J). Powers up to 7km. CP450: Battery powered and featuring full and low power settings (0.43-0.2J). Powered by 12v with internal D cell back-up. Powers up to 3km. Comes with stake stand, fence connect cable and earth stake connection wire. 3 year warranty.