Compatibility list:
305305188 DS-KH7300EY-WTHE2/White(O-STD)
305305159 DS-KH7300EY-THE2/White(O-STD)
305305146 DS-KH7300EY-TIE2/White(O-STD)
305305145 DS-KH7300EY-WTIE2/White(O-STD)
305305144 DS-KH7300EY-TIE2(O-STD)
305305142 DS-KH7300EY-WTIE2(O-STD)
305305141 DS-KH7300EY-THE2(O-STD)
305305140 DS-KH7300EY-WTHE2(O-STD)
305304860 DS-KH7300EY-WTE2/White(O-STD)
305304214 DS-KH7300EY-TE2(O-STD)
305304184 DS-KH7300EY-WTE2(O-STD)

Upgrade guide:
1. Prepare a TF card, use a card reader to connect to a computer, format it as FAT32, then copy firmware file "digicap.dav" to its root path.
2. Insert TF card into indoor station and then start the device (or restart it if it's already powered on).
3. When the indoor station starts up, it will ask you if you want to upgrade it now. Press OK to proceed upgrade process.
4. After upgrade finished (100%), you can take out TF card.
* If you want to use the same TF card for storage, you need to delete the firmware file (with card reader & computer), then insert it back into indoor station. Otherwise it will ask you  to upgrade again next time you reboot indoor station.