FireBeetle OSD Character Overlay Module DFRobot FireBeetle On-screen Display (OSD) Character Overlay Module is a single channel module with screen menu adjustment display technology. The OSD overlay module is based on the AT7456E OSD chip and is compatible with FireBeetle series interfaces and mainboards. This display module incorporates 512 bytes of Electrically Erasable Programmable Read-Only Memory (EEPROM) user-defined storage space. The OSD overlay module offers a 540 x 192 pixels display that shows 16 x 30 characters on the screen when connected to AV sources. Typical applications include device character display and time display of monitor devices such as road cameras and home automation.