Features: Led slings bag that pleases your eye and has a individuation led screen designed to standing out in the crowd and attract all the attention. Usage Instructions Step 1: Insert the led bag into the mobile power banks and turn on the power, Step 2: Download the APP on your mobile phone Step 3:Proceed to connect via Bluetooths to easily setups your backpack. This product also comes equipped with instructions or you may contact our Customer service to assists you. 3D waterproof designs the led crossbody bag uses three dimensional design, hard shell waterproof fabric,entertained in addition to the small rainy weather, perfect for mountaineering, cycling, hiking, skateboarding and other sports. Easy to wear Waterproof Crossbody Bag is designed with adjustable shoulder strap,can carry it on your shoulder or waist, according to different body type and needs, adjust the appropriate length Wonderful gift,sweet warm gift for friend family and yourself. Specifications: Material:420D nylon,lining:320D Package Includes: 1Piece slings Bag with LED Display note: Please allow 1-2cm errors due to manual measurement. Due to the differences betweeen different monitors,the picture may not reflect the actual colour of the item.