External auxiliary battery of 4,000 mAh made of recycled aluminum. With USB output and USB Type C input/output. LED indicators of charging status and included Type C charging cable. Includes recycled aluminum label. Recycled aluminum is a material with almost infinite recycling possibilities, retaining its original properties while consuming less energy in the process. GRS certification (Global Recycled Standard), which guarantees the recycled origin of the material used to manufacture the product. USB Type C input/output: 5V DC 2.4A USB output: 5V DC 1A The capacities shown in all our external auxiliary batteries are real, incorporating all Grade A and non-recycled batteries, with a lifespan of at least 500 charge cycles and in accordance with CE regulations. Additionally, they are manufactured according to RoHS standards and in compliance with the following safety requirements: Overcharge protection system for the power bank. Complete discharge protection system that provides greater durability for the power bank. Locking system to prevent short circuits. Constant load transfer system, according to the capacity of the destination device.