If this product says "Pre-order", it means that this product is on its way to offices since it has just sold out, it will arrive in approx. 10-15 business days. You can buy it today and ensure availability. Upon arrival, we will ship it immediately! Keep in mind that in this case, the arrival of your package would take the processing time + national shipping time selected. You will receive your no. of guide and you will see results of your shipment until concluding the process of 10-15 business days. In case of selecting models in stock + pre-order in a single order, the complete order was sent until receiving the models in pre-order; Please note that 1 order equals 1 shipment.