Specification: _x005f_x000D_ Micro USB input: 5V 1A _x005f_x000D_ USB output: 5V 2.1A/5V 1A (dual USB interface) _x005f_x000D_ Charging display: intelligent digital display _x005f_x000D_ Battery type: liquid lithium-ion battery (18650) _x005f_x000D_ Screen size: 27mmx17mm _x005f_x000D_ Output load indication: After connecting to the load, long press the LED button to start the output. The display screen will display the OUT letter and the relative output voltage and current 5V1A or 5V2.1A _x005f_x000D_ Protection function: The protection circuit of the boosted lithium battery has been integrated to prevent over discharge, overcharging, and overload. _x005f_x000D_ Product size: 57 * 28mm/2.24 * 1.10inch _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Note: _x005f_x000D_ Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! _x005f_x000D_ Please allow 1-2cm measuring deviation due to manual measurement. _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Included: _x005f_x000D_ 1 x Mobile Power Module 1. DIY Power Supply Module: This module is a versatile accessory for building your own customized power supply using 18650 battery cells. Perfect for DIY enthusiasts with basic electronic assembly skills. 2. Built-in Protection Functions: The module provides multiple built-in protection functions, including overcharge protection, over-discharge protection, and overcurrent protection. Ensures the safety of both the module and connected devices. 3. Intelligent Charging Control: Once the connected device reaches full charge, the module automatically stops charging to prevent overcharging and potential damage to the device. Enjoy smart and safe charging. 4. Stable Output Voltage and Current: The module ensures stable output voltage and current, protecting your valuable devices from potential damage caused by unstable power supply. Provides a reliable and consistent power source.