External Auxiliary Battery Made of Bamboo, with a Charger Capacity of 2,200 Mah. Easy to Carry Thanks to Its Small Size, with USB & Type C Output & Input. Specially Designed for Laser Engraving. Includes Micro USB Cable & Comes in an Attractive Design Box. Instructions Manual in English & Spanish. Materials Such as Bamboo Encourage the Use of Natural Raw Materials, Reducing Pollutant Emissions. It Comes From a Highly Resistant & Versatile Plant with Rapid Growth & Regeneration, Making of It an Excellent Alternative to Traditional Wood. The Capacities Shown in All Our External Auxiliary Batteries Are Real, All of Them Incorporating Non-recycled, Grade a Batteries, with a Service Life of at Least 500 Charger Cycles, & Complying with Ce Regulations. In Addition, They Are Manufactured According Rohs Standards, & in Compliance with the Following Safety Requirements: Power Bank Overcharge Protection System. Complete Discharge Protection System, Which Increases the Durability of the Power Bank. Blocking System to Prevent Short Circuits. Constant Charger Transfer System, in Accordance with the Capacity of the Target Device. 2200 Mah. USB Output. Type C Output & Input. Colours: Natural. Minimum Quantity: 25.