Turning on your Ailunce HS2 and entering the SET item, there are fifteen items to set.
KEY-LED: It's the keypad led setting item. you can set the led of the keypad to be ON or OFF via right and left direction keys.
OUT-BAND-EN: It's the enable of out-band setting item. you can set it to be ON or OFF via right and left direction keys. if you set the select the ITU 3, but set the frequency to be 454.003MHZ(the legal transmission frequency band of ITU 3 is 430~440 MHZ). Then when you try to transmit, the transceiver will show as below.
TX-EN: it's TX enable setting item. if you only want to listen to others QSO, you can set it to be OFF via the right direction keys. of course, you can set it to be ON via the left direction key when you want.
KEY-VOLUME: It's the key volume setting item. you can set it to be 0~20 level.
BACKLIGHT: It's the backlight level of the display setting item. you can set it to be 0~5 level.
LED_BRIGHTNESS: It's the RX indicator light setting. you can set it to be 0~5 level.
HOUR&MINUTE&SECOND: It's the time setting in the main display.
FAN-EN-TEMP: It's the fan start temperature setting. You can set the temperature from 30 to 70.
VSWR-PROTECTION: VSWR protection threshold，OFF means unrestricted VSWR.
VSWR-TUNER: VSWR cut-off threshold, stop at less than the value.
TOT-TIMER: It's the timer of transmitting. If the "TALK" button is held for a long period of time, the radio will automatically stop transmitting. Of course, you can set it OFF.
TX-DISABLE-10M: You can turn ON or OFF the transmit of 10M.
FW-VERSION: you can check the current firmware version of your Ailunce HS2.
HAM_AERA: there are ITU_R1, ITU_R2, ITU_R3 to select. You can select your ITU zone. Attention：don't select ALL.
It's a hidden setting item. You can do as below if you want to set ITU region.
if you haven't activated your HS2: turn on=>select "NO"=>enter 685911=>long press MENU=>SET=>ham area, via left and right key to select ITU=>long press MENU key to save and exit
if you have activated your HS2: turn on=>long press MENU=>Cursor on the top option above, long press PA, enter 685911=>long press MENU key to save and exit=>reenter SET=>ham area, via left