Main Features: 1. One-time investment in permanent income, Maintenance free, easy to installation. 2. Long life span and high stability, Large capacity battery. 3. After sales service, just send back the pictures or videos, we will provide professional solution within 24 hours. 4. Digital LCD and LED for visualization of operation status of the equipment. 5. Overcharge protection and overdischarge protection for a longer battery life. 6. Overall automatic protection and alarms including AC output overload protection, short arcuit protection etc. 7. Our product are CE,ROSH,TUV,ISO,FCC,UL2743,MSDS,UN38.3 PSE approved, meeting various certification requirements for different countries.