★ANTI THEFT DESIGN: This bag apply anti-theft design technology. The zipper of the main pocket is fully hidden in the back of the backpack, no thief will easily open your backpack. Equip with a secret pocket behind the bag which can keep your valuable items from thieves ★USB CHARGING PORT DESIGN: With a built-in USB charger outside and a built-in charging cable inside, this USB bag offers you a more convenient way to charge your electronic device anywhere. This backpack doesn't power itself, you need a power bank to charge it! ★VARIES FUNCTION BACKPACK:180°adjustable main compartment, various function pockets for pens, phone, wallet and a slim laptop or tablet, elastic band design and velvet inside material laptop compartment to protect your laptop ★NIGHT SAFETY AND FUNCTIONAL BACKPACK: There is a reflective stripe on the front of the bag which makes this backpack more visible at night. ★COMFORTABLE SHOULDER STRAP AND BACK DESIGN: Padded and adjustable shoulder straps offer light-weight carrying, EVA back material will protect your back and your laptop in heavy carry, ventilate and comfortable.