Can I know the exact delivery time to the product in advance?
No. The delivery time varies depending on the availability of the product.
The shipping date (ex-works) is shown in the shipping confirmation. Standard delivery times within the EU are 1-2 weeks.
https://osi.rosenberger.shop/en/B2B-Hilfecenter/OSI-helpcenter/Lieferung-B2B/delivery/Can-I-know-the-exact-delivery-time-to-the-product-in-advance