Charging cable: support three type of USB Cables for iPhone Apple interface & Andriod Type-C Micro- USB.Button function: Press and hold the button after standby, the LED digital screen displays the power [LED Indicator Display]The LED digital screen displays the current battery charge while charging.When discharging, the LED digital screen displays the current power, and the display is saved in about 30 seconds (double-click the button to resume display).The system will provide an accurate battery indication after a complete charge and discharge. Condition: New Type: Voltage Regulator el Number: 18650 Battery Charger Power Bank Charging Board Application: Operating Temperature:-5 -45 Celsius Supply Voltage:5V Dissipation Power:12W Weight:10.8G IR of PCM :less than or equal to 65 mΩ Allowed 0V change:Yes Constant current:2.4A Dual output current:5V 2.4A Input voltage B+ to B-:3.0-4.2V [Prevent Overcharge Protection] Detection voltage:4.20+/-0.05V Release voltage:4.100+/-0.05V Detection delay time:Less than 200 ms [Prevent Overdischarge Protection] Detection voltage:3.0+/-0.10V Release voltage:3.10+/-0.10V Detection delay time:Less than 100 ms [Short Circuit Protection] Short detection delay time:Less than 50μS Release Conditions:Cut off load [Normal Current Consumption] Normal current consumption of PCM:Max 60μA Stanby current consumption:Max 50μA Suggest Working Conditions Max continuous charge/discharge current:1.5/2.4A colour:green Material:ABS size:6.5 x 2.5 x 0.1cm Package Contents: 1 x 18650 Charger Power Bank Charging Board Note:The positive pole of the battery is connected to B+ and the negative pole is connected to B-, do not reverse it. If it is reversed, it will burn out!!!! This ule is a portable backup power supply with an input that matches the 5.0V adapter to charge the internal battery. Use built-in battery for portable device to provide 5.0V/3.0A USB2.0 supply output for external devices. Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.