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Thank you for your kindly understanding, let's hope new negotiations can start then bring shipping customs rates down and calm the market down in the near furture.

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About this item

The Output Voltage Can Be Adjusted Arbitrarily: The Adjustable USB Step Up Down Power Supply Module used as a USB input adjustable desktop power supply, the output voltage can be adjusted arbitrarily, and the current limit is 0-2A (wide input 4-13V, wide output 0.5-30V arbitrarily adjusted, with short circuit protection, the short circuit does not burn)
Safe to Use: Used as a USB charging cable, the charging voltage and maximum charging current can be adjusted arbitrarily (any voltage, with constant current, anti-backflow, which can meet the charging of most batteries)
Three Input Power Modes: Input 1: Standard Type A USB Male. It just can input DC 5V. Input 2: Micro USB Female. It just can input DC 5V. Input 3: IN+ and IN- welding pads. It can input DC 4.0V-13.0V. When using the welding pad to input, be careful not to connect the reversed positive and negative poles, and do not connect to AC power
Multiple Protection Functions: short-circuit, over-current, over-temperature, over-power, over-voltage protection, charging anti-backflow protection
Wide Application: It is widely used in ordinary power supply, battery charger, LED driving power, instrument voltage display, test counter, circuit test, power conversion. For more details, please read the user manual

Features

*3 input power modes *4-Bit digital tube display

*Support short circuit protection *Support anti-backflow protection

*Support charging mode *High resolution

*Support constant voltage constant current adjust

*Support over-current protection

*Support over-voltage protection

*Support over power protection

*Support over temperature protection

*Multiple parameters can be displayed in turn

*Good choice for hobby electronics or simple electronic repair

*Great little DC voltage meter, power supply and constant current battery charger

Input and output ports

Input terminal-left side, USB male connector, micro USB, welding three ways to choose as input.

Output terminal-on the right, the blue 2P terminal is used as output.

15W DC-DC Adjustable USB Power Supply Module

Function Description

Button

"SELECT" key: short press-switch between voltage, current, power and wheel display; long press-enter or exit calibration mode

"ON/OFF" key: short press-to control the opening or closing of the output terminal; long press-to set the default output of power-on to off or on, long press for more than 3s to release. Displaying ON means that there is output by default every time it is powered on, and OFF means that there is no output by default every time it is powered on.

CC——constant current indicator, the light is on when the current is constant (red)
ON——output status indicator (green)

Note:

1>.It is a DC power module,So it can not connect to AC power.

2>.Please don’t short output.

3>.’IN-’ and ‘OUT-’ can not be connect together,otherwise module can not support constant current output.

4>.Please make sure input power is more than load power.

5>.Please step down output power if module is hot.

6>.Rotate CV potentiometer counterclockwise more than 10 turns if the output voltage can not be adjusted.

7>.Output current can not keep fix value output.It changes with load.But It can not exceed set output current value.

8>.There is a protective film on the surface of the shell. It is recommended to tear it off for a clearer effect.

9>.Please read use manual and description before use.

Product Display

Button/Potentiometer/LED introduction

1>.Long press means need keep press for more than 3second.

2>.Left Button: The long press is used to set default ON or OFF for the next re-power at display mode. Short press to select whether output voltage at display mode or as ‘Minus -’ in calibration mode.

3>.Right Button: The long press is used to enter or exit calibration setup mode at display mode or as ‘Plus +’ in calibration mode. Short press to switch display output voltage, output current, output power or display these parameters in turn.

4>.CV Potentiometer: Adjust output voltage. Increase the output voltage when rotating clockwise. Please rotate the CV potentiometer 10 turns in counterclockwise if the output voltage cannot be adjusted.

5>.CC Potentiometer: Adjust output current. Increase the output current when rotating clockwise. Note: It is not keeping a fixed output current. When the load current reaches the set current value, the module starts to fix output this current value.

6>.ON LED: Green Output indicator. It will turn ON when there is an output at the output terminal. Otherwise, it is OFF.6>.ON LED: Green Output indicator. It will turn ON when there is an output at the output terminal. Otherwise, it is OFF.

7>.CC LED: Red Constant current output indicator. It enters the constant current state when the load current reaches the set current and CC constant current indicator turns ON.

8>.Input terminal: There are three input methods:

8.1>. Method 1:Standard Type A USB Male. It just can input DC 5V.

8.2>. Method 2:Micro USB Female. It just can input DC 5V.

8.3>. Method 3:IN+ and IN- pads. It can input DC 4.0V-13.0V.

8.4>. It can only choose one input method.

9>.Output terminal:KF-301-2P 5.08mm blue terminal. It can output DC 0.5V-30.0V.

Shipping

> We ship to worldwide.
> Orders processed within 24-48 hours after payment verification.
> We only ship to confirmed Paypal addresses. Your Paypal address MUST MATCH your Shipping address.

Country	Shipping Way	Shipping Time	Trackable
United States	USPS(ePacket)	7-18	Yes
Russia	China Post	15-35	Yes
Other Country	Economic Air Mail	15-40	No

If you need register mail or other express shipping, Pls contact us.

Warranty & Guarantee

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About me

Please contact me first before you leave a negative review if my item are damaged or defective when you got it, I'll do resend or refund (as your choice) once I confirm with that, which is a most kind of favourable way to both of us work things out together.Your support and comprehension are highly appreciated for me. Thanks for everything, and at last, I full of expectation to do business with you!!!!