Features 1、ADJUSTABLE RANGE: The input voltage is 3.7‑8V, and the output voltage is 4.3‑27V, which can be adjusted counterclockwise. 2、MULTIPLE PROTECTION: The boost module has overcharge and overdischarge protection, safe and efficient in operation. 3、CHARGING FUNCTION: Can be used to charge multimeters and 18650 lithium batteries, with strong practicability. 4、STABLE SIGNAL: The input and output signals of the module are stable, with little interference and convenient operation. 5、COMPACT SIZE: The step up module is small and compact, quick to install and does not take up space. Specification Item Type: Boost Module Default Output: About 12V, good debugging before use Charging Current: 1A maximum Maximum Discharge Current: 2A, you must calculate the output current by yourself Output Reference Maximum Current: 12V 0.6A Quiescent Current: About 0.5 mA Overcharge Protection: Yes Over Discharge Protection: None (it can also be said that there is a 2V cut off boost, but the output is not blocked, and the output is still 2V) Package List 1 x Boost Module