Bopai 61-93318A Hard Shell Waterproof Expandable Backpack with USB Charging Hole, Spec: Password (Silver) Digital Photo Frame Product materials: Adopt aluminum alloy

Product materials: Adopt aluminum alloy CNC technology

UV-treated bezels attach to stock mounting points perfectly

Size: 15x11

fidelity output audio

Bopai 61-93318A Hard Shell Waterproof Expandable Backpack with USB Charging Hole, Spec: Password (Silver) Digital Photo Frame Product materials: Adopt aluminum alloy1. Material: PC, polyester 2. Function: waterproof, wear resistant, anti theft, shock resistant, capacity expansion, load reduction 3. Accommodates computer size: 17. 3 inches 4. The PC is pressed into one piece, and carbon fiber material is added, which is wear resistant and impact resistant. 5. The fan shaped half open bag design makes it more convenient to take items 6. The back adopts hollow groove design to enhance air convection and effectively