> Portable > Lithium battery 2000mah > Max Output DC 12V5A/19V3.5A/24V 3A Optional > Work for CCTV, modem, router etc. > Long-backup time,smart chip control,0 transition > No switch control, automatically recognize loads to achieve intelligent control and energy saving function. > Mains supply takes precedence over battery supply, and the UPS can discharge while being charged.