Description Wireless Intercom System for Home Two Way Talk 2km Range LCD Screen Group Calls Room To Room Master Intercom Item Type: Wireless Intercom Maerial: ABS Built in Battery: 2000mAh Lithium ion Battery Volume Level: 7 Levels Communication Distance: Up to 2km in open space Host to Host Intercom: All hosts can call each other Host to Sub intercom: Host can call sub intercoms How e Step One: Setting the ID Number for the Host 1. Press and hold the Settings key for 3 seconds until a beep is heard. 2. The screen will display 1. 3. Press the OK key and ID: 999 will begin to flash. 4. Use the keypad to input the desired ID number (0 is between 1 and 998). 5. Press OK to confirm and an audible dudu sound will indicate that the ID number has been set successfully. Step Two: Setting the Same Channel CH for the Host 1. Press and hold the Settings key for 3 seconds until a beep is heard. 2. Press the upward arrow key ^ once and the screen will switch from 1 to 2. 3. Press OK and CH: 01 will begin to flash. 4. Use the upward or downward v arrow key to adjust the channel CH, selecting a channel number between 01-20. 5. Press OK to confirm and an audible dudu sound will indicate that the channel CH has been set successfully. Step Three: Setting the Same Password for the Host 1. Press and hold the Settings key for 3 seconds until a beep is heard. 2. Press the upward arrow key ^ once more and the screen will switch from 1 to 3. 3. Press OK and 000 will begin to flash. 4. Use the keypad to input the desired password, a three-digit number between 001-999. 5. Press OK to confirm and an audible dudu sound will indicate that the password has been set successfully.