Features: This adjustable voltages 18650 powerbank case features DC5V-12V output compatibility for outdoor adventures and daily use. Engineered with 18650 battery easy installation and ruggeds plastic construction, the powerbank case offer voltages adjustment through single clicks increments (5V-12V ranges) and DC5521/USB/Type C outputs, optimized for devices under 18W like routers and LED lights. Builts with overcurrent protections and heat resistant plastic housing, this battery case ensures safe operate across temperature variations while its voltages lock function prevents accidental high voltages damage to sensitive electronics. Tips: 18650 batteries are not included in the package, you need to purchase separately. Can only use the 18650 battery of which positive electron is flat top. Please pay attention to the direction of the positive and negatives poles. After installing the battery, please fully charging it and activate it before outputting. PowerBank Case only, other accessories in the picture is not included! Specifications: Component: Plastic, Size:Approx.159x85mm/6.26x3.35inch Color: Black, White Power Cord Interfaces:DC4x1.7mm,DC3.5x1.35mm, Supports DC5V-12V adjustable voltages, flexibly meeting the power supply needs of different equipment. Package Includes: 1pc Battery Case 1pc Power Cord note: Please allow 1-10mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.