Back to School Season Three-piece Backpack Bluetooth Speaker Sports Bracelet

knapsack: Large and expandable capacity, very wear-resistant, easy to go out, Waterproof internal dry-wet separation strip

Sport Smart Watch: The low-power chip is more durable in standby, improves the accuracy of motion data monitoring, small size, low power consumption, and high performance.

Portable intelligent speaker: Lower power consumption, more stable transmission, fashionable and portable， Built-in rechargeable battery ensures uninterrupted music playback for hours

knapsack: 

Material: Oxford. 
Capacity: 56-75L. 
Length: 60cm Width: 32cm Height: 32cml
Weight: 850g

Sport Smart Watch: 

Screen material, thin film transistor 
Watch strap material, silicone

Portable intelligent speaker: 

Weight: 300g
Battery Capacity: 500mAh
Maximum wireless range: 10m-20m
Size: 113.7* 149.7* 57mm 
Weight: 225g