The app is terminal application, it can transaction data between Bluetooth device. It's can save all send and receive data to file. File save in /sdcard/. Log. Is yyyyMMdd. Description for setup in menu. Display hexadecimal: show data of hexadecimal format. Send hexadecimal: sned hexadecimal text. Ex, "ABC 39 30", client will receive "ABC90". Hex 39 = "9" hex 30 = "0".