Expandable Capacity 3600Wh To 21600Wh For Your Power Need Voice Control,WIFI,Blueteeth,Touch Screen Simple operation, Easy to use. UPS function: Nerver Run Out Of The Power Long-Lasting Powerhouse Designed For 10 Years Of Everyday Use Power-Saving Mode Save On Energy Costs Switching to power-saving mode extends standby time and minimizes battery damage. QUIET MODE No noise,no fumes,just sustainable power Ergonomic And Ultra-Portable Design Power Anywhere With ALLPOWERS S4000 Enjoy Your Family Time