100% brand new and high quality Features: Step up board: use 18650 battery to step up to 5V. Charging board:input 5V 1A or 2A to charge the 18650 battery. Battery protection board: over-charge protection, over-discharge protection, over-current protection, over-temperature protection, output short circuit protection. UPS(Uninterrupted power supply):if input 5V , it will charge the battery and no use the battery power; if power failure, it will automatically use the battery power. Lithium Battery Step Up Module only, other accessories demo in the picture is not included Specification: Voltage: 5V, 6V, 9V, 12V Material: Plastic&Metal Dimensions: 7.7x2.1x2.3cm/3.03x0.83x0.91inch Color: Green&Black Quantity: 1 Pc Note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you 3.Please use for <=5W device. Package includes: 1 x Lithium Battery Step Up Module (without retail package) The four-in-one booster board uses small tips: 1. When using as a UPS, the SW pin should be shorted, the output should be kept in real time, and the power can be turned off to start the battery at any time. 2. As a mobile power supply, it can be connected to the SW switch, it is turned off when not in use, there is no static loss, and it is very energy-saving. 3. If the SW does not want to connect the switch, it can also be shorted, and the output indicator will be soldered after all the tests are completed. This can reduce the current consumption of ten or twenty mA without affecting the normal output of the circuit and compare the power saving. 4. During the operation, it is possible that the board will enter the protection state and not output due to various reasons (mistakes, misconnections, etc.). After the problem is removed, the board charging port can be connected to the 5V charging, and the board is re-powered. The re-output can be activated. 5. Special usage (very special): If you want to supply 5V to the load when there is external 5V power supply, 3.7V (no boost) for the load directly from the lithium battery when there is no external power supply, you can connect the positive output line of the board directly from the S-pad lead of the SW pin. load. 6. The 5V charging power supply used by individual users internally uses a large capacitance output capacitor. This capacitor can continue to discharge after the power is turned off, so that the power supply voltage has a slow down process, which will cause the power supply to turn off the board. Did not switch battery power quickly. If you encounter such a situation, please contact us to provide a free solution.