Feature: 1. New mask fan to accelerate air circulation, inhaling fresh air. 2. Light weight, remove extra parts, product weight completely reduced. 3. Selected stable and durable high-quality motor with static speed control function. 4. Can be charged on mobile power or computer and commonly used USB devices. Specification: Name: Mask Fan Color: As shown in the figure Charge Input: 5v 106mA Output Power: 5w (Max) Battery Model: Lithium Battery 601828, 300mAh (with Protection Plate) Full Time: 3h Use Time: 2h-2.5h Size: As shown in the figure Package Includes1PC Note: 1. 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 2. Please allow 1-2cm measuring deviation due to manual measurement.