10pcs Dc-dc Step-down Module

Are you looking for a professional, yet affordable DC-DC step-down module? Are you in search of a sturdy, trustworthy tool that can do multiple jobs at once? If yes, look no further
Our professional DC-DC step-down module must meet you needs. It is one of the best choices for you.
Features
- Color: Blue.
- Material: Plastic, metal.
- Size: 2 x 1 x 0.5 cm/0.8 x 0.4 x 0.2 inch.
- Input voltage: DC 4.2 V-10 V.
- Output: 3.3 V, 800 mA.
- Boost modules or buck module indicate the operating voltage, Please donot exceed operating voltage , or it will be damaged easily
- Boost module output voltage can only be greater than or equal to input voltage, cannot be less than the input voltage
- Buck module input voltage must be higher than output voltage of 1.5V or 2V, otherwise it can not output enough power
- Automatic Adjustable Boost or Buck module has start voltage and limit working voltage, Please donot exceed them , or it will be damaged easily
- Cannot reverse polarity , or it will be short circuit, or will be born easily