Features:_x000D__x000D_With voltmeter display, voltmeter error 0.1V, range 0 ~ 40V. _x000D_Touch the button to switch the measurement input or output voltage, and the indicator light shows which voltage is being measured, and keep the last setting, even if it is powered off and then on. _x000D_The voltmeter can be turned off by pressing and holding the switch for more than 1 second and less than 4 seconds. _x000D_With terminal block, no soldering iron can be used conveniently, and the wire bonding point is retained. The input voltage is 4.0~40V (the input voltage must be higher than the voltage to be output by more than 1v.). _x000D_Adjustable output voltage range from 1.25V to 37V continuously adjustable (input voltage must be higher than the voltage to be output by more than 1V). _x000D_The maximum output current can be as high as 3A, and the common stable operating current is 2A. _x000D_Using 150KHz internal oscillation frequency, it belongs to the second generation of switching voltage regulator, with low power consumption and high efficiency. _x000D__x000D_Specification:_x000D_Material:Epoxy Resin_x000D_Voltage Meter :Error+-0.1V;Measuring Range:0~40V_x000D_Input Voltage:4~40V_x000D_Adjustable Output Voltage:1.25~37V_x000D_Maximum Output Current: 3A_x000D_Stable Current: 2A_x000D_Internal Oscillation Frequency: 150KHz_x000D__x000D_Package List:_x000D_1*Module_x000D__x000D_Users Manual:_x000D_Input and output voltage measurement error calibration function, long press the switch for more than 4 seconds, after entering the hand, it will enter the voltage measurement error calibration function. _x000D_At this time, the in light is on (calibration input terminal), and the digital tube flashes to display the correction value (factory parameter is 0.0) At this time, press the button to change this value (the value range is -0.5~0.5, the unit is V), the positive number means upward calibration, and the negative number means downward calibration. _x000D_After adjusting the comparison value of the input end, press and hold the button for more than 2 seconds, then release the error calibration after the release, then the out light is on (calibration output), and the calibration value of the output is displayed._x000D__x000D_The adjustment method is the same as the input. After the comparison value at the output end, press and hold the button for more than 2 seconds. After releasing the hand, save the set value and return to the normal display voltage. The set correction value takes effect immediately and the power is not lost. _x000D__x000D__x000D_Note: _x000D_The input voltage is lower than 4V, the onboard voltmeter does not work and does not display. 1Touch the button to switch the measurement input or output voltage, and the indicator light shows which voltage is being measured, and keep the last setting, even if it is powered off and then on. 2The voltmeter can be turned off by pressing and holding the switch for more than 1 second and less than 4 seconds. 3With terminal block, no soldering iron can be used conveniently, and the wire bonding point is retained. The input voltage is 4.0~40V (the input voltage must be higher than the voltage to be output by more than 1v.). 4Adjustable output voltage range from 1.25V to 37V continuously adjustable (input voltage must be higher than the voltage to be output by more than 1V). 5The maximum output current can be as high as 3A, and the common stable operating current is 2A.