The built-in smart chip can automatically identify and charge most devices on the market. automatically adjust the output to deliver the most suitable current, keep your devices from overcharging, over-current, over-voltage and short circuit to protect the safety of your products. There is a 20w fast charger and comes with a three-wire digital display, which makes it very suitable to carry both outdoors and while traveling! Can be customized company logo, is as a good choice for publicity, no one will refuse a portable and good charging treasure, if there is any idea of customization, please do not hesitate to contact us! Made from plastic material, measuring 3.6*2.36*1.14 inches, this custom mini 20w fast charging portable power bank. Usage Scenarios: Office supplies, school stationery, corporate promotions, trade show giveaways. Customization: Logo printing available with multiple packaging and color options. Product Highlights: Compact size, lightweight, easy to carry.