Product：

5L Wireless Control Light-up Warning Cycling Backpack 

Model：

3B0108

Bladder Volum:

2L

Application：

Unisex

Capacity:

 5L

Usage:

Cycling, Running, Hiking

Frequency of wireless:

2.4GHZ

Controlling distance: 

3m

Transmitter's Battery:

2* CR2032

Transmitter's Shell Material:

ABS

Transmitter's Waterproof Grade:

IPX-5

Receiver's Battery:

3.7V, 850mAh Lithium battery