Discounts, codes, and cashbacks are limited-time promotions in which you can save a lot of money. If an item is on sale, you will see the new price right next to the old one. If a discount code applies to a product, you will find it in the category listing above the product price or in the product details below the image gallery. You must then enter the discount code in the "Use discount coupon" field before submitting your order. Items with a cashback option are also marked in the same way. If certain conditions are met after purchasing these products (e.g. registration of the goods on the manufacturer's website), you will receive part of the total price back. You can find out all the terms of the specific cashback policy in the product details.
Blu-ray discs are the third generation of optical discs intended for the storage of digital data. Data is stored in the spiral-shaped track 0.1 mm below the surface of the disc, with a lateral stop distance of 0.35 micron. Laser light is used to read Blu-ray discs with a wavelength of 405 nm. Technology was developed by the Japanese company Sony, with other firms like Philips being involved also. The name Blue-ray is associated with the color of light used for reading the data.