Features: 3-in-1 Charging Function: supports charging three batteries at the same time, improving work efficiency. Portable design: lightweighted, easy to carry, perfect for travelling and outdoor activity. Intelligent protections system: Over-charging, overheating, short-circuit and other multiple safety protections to ensure the safe charging of the battery LED Indicator: Clearly shows the charging status and makes it easy to monitor the charging progress. Compatibility: Specially for action camera batteries to ensure a perfect fit. Specifications: Item:3-in-1 Charging Case For 3 Batteries for 13 Component:ABS Size:about 12.5x6.5x2.50cm/4.92x2.56x0.98in Input: 5V/3A Output: 4.4V 900mAx3 Chargingtime：3~4h Package Includes: 1PC Chargign Case 1PC Charging Cable note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.