AGPtEK 8 in 1 External CD/DVD Drive for Laptop USB 3.0 Ultra Slim w/4 USB Ports

Open the tray: For Windows, simply press the button on the front of the drive to eject the tray. If the device fails and cannot be opened, there is a reset hole next to the pop-up button, a pin can be used to eject the tray through the reset hole.

eBay