5pcs DC-DC 2 In 1 6.5V-40V To 5V Buck Step Down Power Module Voltmeter Automatic Calibration Stable Output 5V 2A USB Cha

Specifications 1 Ultra wide voltmeter range DC 4 5 40V2 5V 2A output current capacity when the input voltage is at 6 5 40V can stabilize to output 5 0V voltage 3 One key output enable button switch USB output one key low powerbutton into ultra low power consumption4 Voltmeter can be self calibration there will never be inaccurate voltmeter problems 5 Reverse connection protection reverse connect not burning6 With over current and over temperature protection7 With USB power indicator8 With wiring terminals easy access to the line9 High efficiency and low ripple Module instructions After power module can be real time detection of voltage when you need to charge for mobile phone Ipad MP3 and other digital products touch the output enable button the USB power indicator lights USB output 5 0V voltage when you need to close the digital tube touch the low power button then the module into the ultra low power standby mode USB output is also shut down accordingly Module use Ultra wide input voltage can be used for cars battery vehicles motorcycles used to monitor the battery voltage timely grasp the battery state can be used for various voltage measurement purposes The output current capability of the 5 0V and 2A is sufficient to meet various USB devices and the voltage is very stable Note this module defaults to D D short connection compatible with most mobile phone charging and set aside a variety of mobile phone to identify resi