Main Features:<br />It will automatically turn on when connect to USB power<br />First display the voltage for 5 seconds↔? later come back to the default status current<br />Automatically detect the demanded current and then output it<br />Screen: Display voltage or current<br />Current display: 0 - 2.5A<br />Work temperature: 0 - 60 degree<br /><br /><br />Mode switch: <br />Turn left: Data communication mode (blue light on)<br />Turn right: Smart charging mode (light off)<br /><br /><br /><br />    Specifications<br />Specification<br />	 Input Voltage: 3 - 7V                                                  <br />                        Color  : White                                                	<br />Dimension and Weight<br />	 Product weight   : 0.020 kg                                                  <br />                        Package weight   : 0.025 kg                                                  <br />                        Product size (L x W x H)  : 5.5 x 3.2 x 1.5 cm / 2.16 x 1.26 x 0.59 inches                                                  <br />                        Package size (L x W x H)  : 12 x 9 x 2 cm / 4.72 x 3.54 x 0.79 inches                                                	<br />Package contents<br />	 Package contents: 1 x USB Charging Head↔? 1 x English-Chinese User Manual                                                	<br /><br /><br /><br />                                                <br />