PRODUCT DESCRIPTION:
Feature: USB, Waterproof
Power supply: Power bank
Communication method: Bluetooth
Product name: Black 3D Iron Man Backpack With Led Display
Usage: daily, business, advertising, cycling, sports, travel, etc.
LED screen size:Left eye size: 7*10.5*9.5*6.5CM Right eye size: 6.5*10.8*9.5*7CM
Display: resolution 48*48 full color