The external battery "Blank" (5000 mAh) is a useful promotional souvenir for your business. Compact dimensions and a super-thin case (7 mm) allow you to use a portable charger not only in the office, but also on the road, traveling. The device is easily charged using the USB wires that come with the kit. The input ports are micro USB and symmetrical USB Type C, with it you do not need to choose which side to insert the cable. Two USB charging ports with a current of up to 2.1A. The material is ABS plastic. There is an LED indicator that flickers during charging, and when the device is charged, it will glow continuously. Automatically turns off after 6 seconds if the chargeable devices are not detected. An external portable battery "Blank" based on a lithium polymer battery allows you to charge any electronic devices. The two flat sides have ample opportunities for personalization. If you are looking for a stylish and memorable gift for applying a logo, then the external battery "Blank" is an excellent choice!