T4 Hard Shell LED Display Bluetooth Phone Control Backpack Electronic Advertising Screen Daypack

• Made of high-quality waterproof fabric, protect your LED screen on rainy days
• Adjustable shoulder strap with soft pad, easy to adjust the comfortable length
• Honeycomb back pad allows air to flow, takes away dampness and mugginess, and keeps dry
• An ergonomic backpack design can effectively relieve shoulder pressure and travel easily
• Large storage space with multiple pockets design, convenient to store your items
• Easy to use, you can set the LED display freely after connection with your phone
• Back fixing belt make it can be put on your trolley case easily

Specification: 

• Material: Oxford cloth + polyester fiber
• Screen: 128*96 full color dot matrix screen
• Dot Spacing: P2
• Backpack size: 32*14*50cm            
• Screen size: 198x276mm              
• Power supply: USB powered (connect power bank)
• Rated voltage: 5V/2A
• Communication method: Bluetooth
• Support image/animation size: 128*96 pixels
• Supported file formats: text/image/Gif animation