.pd-img-swt-1 {
    background-image: url(../img/produit/switch/switch_1.jpg)
}

.pd-img-swt-2 {
    background-image: url(../img/produit/switch/switch_2.jpg)
}

.pd-img-swt-3 {
    background-image: url(../img/produit/switch/switch_3.jpg)
}

.pd-img-swt-4 {
    background-image: url(../img/produit/switch/switch_4.jpg)
}