How does a slot loading CD drive work?

A slot-load disc drive is a disc drive with no caddy or tray and allows the computer user to insert the disc into a thin slit

Slot-Loading DVD Super Multi Drive 8x DVD±R; 6x DVD±R DL; 4x DVD±RW Slim type Slim Slot-Loading Blu-ray, DVD, CD Recorder 6x BD-R -R DL, 4x BD-XL

slot on Because of this, the tray-loading DVD-ROM drive that I have is useless panasonic makes a slot load dvd drive look in newegg, dvd drives key

slot pharaoh Sony AD-7640A IDE Slot load Internal Laptop CD DVD Writer Reader This AD-7640A CD DVD reader-writer optical disc drive is compatible with the Dell XPS