This is a solderless breadboard power supply module, for your Arduino, Raspberry, AVR, PIC, and STM development project power source. Features: Supported voltage output: 5v and 3.3v Input voltage: 6.5v to 12v DC or USB power supply Output voltage: Can be switch to 3.3v or 5v Maximum output current: Less than 700Ma Fluctuation at two road independent control, can be switch over to 0v, 3.3v, 5v On-board two groups of 3.3v, 5v DC output plug in, on external convenient lead to use. Size: 5.3cm x 3.5cm.