Material and protection: ABS plastic provides impact resistance, heat tolerance, and insulation to protect the power case and your devices. Battery not included: This case does not include batteries. You supply your own power pack to your energy solution while keeping an eye on energy usage. Power capacity and durability: Selfconfigured mobile power with larger battery capacity and improved durability to better address charging needs on the go. Output and display: Features two USB outputs and a clear voltage display to monitor charging status and device voltage. Compatibility and usage: Designed for USBpowered devices and capable of charging two devices simultaneously. Use scenarios: Travel, camping, or remote locations where electrical outlets are limited. Home power outages to keep essential devices powered. Field work or outdoor service requiring portable charging for multiple devices.