1. Download the app (for Android: CaysnPrinter, for iOS: Printer-X) or other related app and install it.
2. Enter the printing paper into the effective side (the smooth side of the printing paper is the effective side, and the smooth side corresponds to the print head) → Remove the battery and tear the "brown high temperature tape" → Place the battery with the "brown high temperature tape" in the print. Long press "power switch" for 3 seconds to turn on the printer power. "→ Find "MTP-2" "in popup" printer "list" (i.e. "name" on the "self-test page") → Click "MTP-2" → Enter the pin code "000" ("0000" an IE "PIN" selftest. page) → Check if the list "Printer" "Connected", "Connected", which indicates that the Bluetooth has been successfully connected.
3. "Self-Check Page" is in the printer. If there is no "self-test page", you can print it yourself. The steps to print the self-test page are as follows: Turn off → Charge paper → Cover → Press at the same time and press the "Paper Feed button" and "Power button" → Listen to 2 drops after the sound, leave two buttons → The printer prints out the "self-test page".