ITEM NAME:5pcs 2-24V to 2-28V 2A DC-DC SX1308 step-up adjustable power moduleC8 Oscillation frequency 1.2MHz efficiency is as high as 95% Circuit has short circuit protection, overheating protection function 10k to adjust potentiometer, adjust the output voltage Maximum input voltage: DC 2-24V Maximum output voltage: DC 2-28V Switching frequency: 1.2MHz Maximum current output: 2A Include: 5pcs 2-24V to 2-28V 2A DC-DC SX1308 step-up adjustable power module.Maximum current output: 2A. Circuit has short circuit protection, overheating protection function.