This is my new version of Emergency device 2' with USB output! You can adjust the intensity on the lamp! You can save several hours of operation, even to see the battery voltage! For practical reasons, the device can operate at 120v or 220v. It is rechargeable and charged with micro USB or with Solar Panel and with Hand Crank! Two batteries connected in parallel have enough capacity to run the device for a long time.. See the previous video on youtube. The item "Emergency Device Multi-Power Bank-Light 2" is in sale since Sunday, December 16, 2018. This item is in the category "Business & Industrial\Healthcare, Lab & Dental\Other Healthcare, Lab & Dental". The seller is "eleman-gc" and is located in HERAKLION CRETE. This item can be shipped worldwide.