Stylish Appearance: Ultra-thin design, metal texture, exquisite appearance, long-lasting durability, only 0.28 pounds, dimensions of 3.93 * 2.55 * 0.39inches easy to fit in your pocket or bag, suitable for daily outings travel Intelligent Chip: Power bank built-in intelligent low-temperature ice core, when the temperature rises abnormally, the system automatically adjusts the charging power to prevent overheating, providing temperature control, overcharge protection, short-circuit protection and other functions to protect your iPhone and battery pack safety