Features: brand new and high quality This is a new version of the ups board. it not only supports 4b, but also adds c-type output. It provides enough power for the to make your still work while moving, and its design is so for smart that you can get rid of the trouble of a dough wire. These ups can provide you with battery replacement operation on your own. This new ups not only supports a standalone rtc module, but also provides a cou counter. It can use most standard 18650 batteries and is fully compliant with battery characteristics in terms of battery life. The power display provided on the circuit board is also very easy to use. The illuminated led light can quickly show the remaining energy and support discharge while charging. You can directly connect to external power supply for charging. At the same for time, will not be turned off. Specifications: Material：ABS Size：as Picture Shows Package Includes: 1 x UPS Power Supply Device. note: Warning! Do not invert the battery! This product belongs to power supply device. Please keep it out of reach of children. Strictly refer to the ups product instructions. Install the battery first and then connect the ups to the Connecting too many high power peripherals will lead to insufficient power supply. Pay attention to the power demand of peripherals. If the battery's polarity is reversed, it will directly burn the device's power management chip and even cause fire or personal injury. Do not add any components yourself, all accidental damage caused by the cause is at your own risk.