What you are viewing now is3V to 5V Non-Isolated Step-up Boost Voltage Mobile Power Module. It is a no welding， non-isolated step-up module， which has wide applications. This module is regularly used formobilepower charge， especially iPhone. You can adjust the voltage to whatever you need， but current should be within the rated current. If your device’s current ismore than the max currentof this module，you should firstly cool it. If you want to find a high efficient booster， you should not let this product slip away. Come to buy one for yourself!You will be satisfied with it!                                    Features            High qualitymaterial and never usedSupport solderless terminal; easy to operateAdjustable boost module can be alteredA good choice for cell phones; supports iPhoneUsed for power supply， it is convenient to use                                                            Specifications             Module Properties     Non-isolated step-up    <br> Rectification     Non-Synchronous Rectification    <br> Input Voltage     2.5V-6V    <br> Output Voltage     4V-12V (adjustable， default 5V)    <br> Output Current     1000mA (Max)    <br> Conversion Efficiency     92% (maximum)    <br> Switching Frequency     1MHz    <br> Output Ripple     20mV (max)    <br> Load Regulation     ± 0.5%    <br> Voltage Regulation     ± 2.5%    <br> Working Temperature     -40 ℃ to +85 ℃     <br>                                                             Package Includes            1 x Mobile Power Module<br>