Portable USB Charger:The USB charger is sturdy but also lightweight and compact. | Indicator: Red indicator means the device is charging, green indicator means the device is fully charged. | Convenience: universal device port, USB charging, portable power supply, computer/laptop USB port, etc. | ULTRA-SAFE & SMART:Built-in Over-Voltage Protection, Over-Current Protection, Over-Charge Protection and Short-Circuit Protection to ensure safely charge. | After Sale Service:We devote ourselves to provide superior after-sale service. If you have any questions, please contact us through our store page and click "ask questions" to find our customer service team.