【Compact Storage Carrying Case Design 】Magnetic flip cover, convenient to open and close it ,Pocket design, lightweight and convenient. Can be hold in one hand，easy to carry without burden.Use fast charging data cable to support fast charging Fully Compatible with Osmo Action 5 Pro 3/4 batteries 【Fully Compatible with Osmo Action 4/3】 Action Extreme batteries are designed to be compatible with Osmo Action 3/4, seamlessly integrating with your device. Combined with the 3-channel USB charging kit, you can conveniently charge the batteries at the same time, always ready to take the perfect photo 【Safe to Use】: Built-in intelligent control chip helps you use Osmo Action 3 4 camera safely. Built-in protections against overcharging, over-discharging, over-voltage, over-current and over-temperature. Multiple circuit protection ensures both safety and stability 【Portable Storage Charger Case】This palm-sized charging case with a lid allows you to charge your batteries at any time during travel and photography sessions. It has a Type-C input that supports 5V 3A/9V 3A/12V 2A,Output voltage/current 4.4v 3A. 【Package Included】 1 x USB C Fast Charger Case for Osmo Action 3 4 Camera, 1 x USB Type C Cable,Buy with Confidence ASIN B0DF2G389Z Brand AuyKoo Color Action 4/3 Amperage 3 Amps Item Weight 0.17 Kilograms Manufacturer AuyKoo Input Voltage 12 Volts Output Voltage 4.4 Volts Number of Ports 3 Warranty Description NO Item Dimensions D x W x H 1.18 D x 2.76 W x 6.3 H