new 15-inch rechargeable backpack men‘s and women‘s 14-inch laptop backpack 15.6 business double-shoulder travel schoolbag

gray (upgraded version)(灰色（升级版）) black (upgraded version)(黑色（升级版）) blue (upgraded version)(蓝色（升级版）) red (upgraded version)(红色（升级版）) gray upgraded version (four-piece set)(灰色升级版（四件套）) black upgraded version (four-piece set)(黑色升级版（四件套）) blue upgraded version (four-piece set)(蓝色升级版（四件套）) red upgraded version (four-piece set)(红色升级版（四件套）) gray (normal version)(灰色（普通版）) black (standard edition)(黑色（普通版）) blue (normal version)(蓝色（普通版）) red (normal version)(红色（普通版）) gray ordinary version (four-piece set)(灰色普通版（四件套）) black ordinary version (four-piece set)(黑色普通版（四件套）) blue ordinary version (four-piece set)(蓝色普通版（四件套）) red ordinary version (four-piece set)(红色普通版（四件套）) gray standard model(灰色标准款) black standard model(黑色标准款)

no specifications(无规格)