Bluetooth Printers
From SI-Droid Wiki
SI-Droid Event (not the Lite version) have support for printing split time receipts on Bluetooth printers. The basic feature should work with almost all Bluetooth printers as long as you are only using the standard English alphabet (A-Z, a-z, 0-9) in the names of the runners. Other characters may come out as garbage.
If you want to use other characters (and get them correctly printed) in the names of the runners, the only printer that I know is working correct is the one I used during development: NT-5802 Bluetooth Printer
With the above printer, I have added character set mappings for most languages