diff --git a/App.tsx b/App.tsx
index 10eb3fe..a1bd2a3 100644
--- a/App.tsx
+++ b/App.tsx
@@ -15,8 +15,8 @@ import {BarCodeDisplay, PrintButton, PrintingMessage} from './components/Print';
 import {IdNumberInput, InitialsInput, InputIdButton, ScanButton, Scanner} from './components/Scan';
 import {SettingsScreen} from './components/Settings';
 import {styles, theme} from './components/Styles';
-import {sendDataToFirebase, SyncMessage} from './components/Sync';
-import {firebaseConfig, defaults} from './config/default';
+import {SyncMessage} from './components/Sync';
+import {defaults, firebaseConfig} from './config/default';
 import {BarcodeScannerAppState} from './models/BarcodeScannerAppState';
 import {CameraType, ElementProps, StateProps} from './models/ElementProps';
 import {LineCount} from './models/LineCount';
@@ -87,7 +87,8 @@ export default function Main() {
   }, []);
 
   // State event handlers
-  const _doNothing = () => {};
+  const _doNothing = () => {
+  };
   const _scan = () => {
     setErrorMessage('');
     setAppState(BarcodeScannerAppState.SCANNING);
@@ -107,13 +108,9 @@ export default function Main() {
 
   const handleBarCodeScanned = (e: BarCodeEvent) => {
     // Make sure the data is the right length.
-    // Scanned barcodes will be exactly 14 digits long.
-    // Manually-entered ID numbers will be exactly 9 digits long.
     const barCodeString = e.data;
-    const pattern = /^[\d]{14}$|^[\d]{9}$/;
-    console.log('barCodeString', barCodeString);
-    if (pattern.test(barCodeString)) {
-      const cardId = e.data.slice(0, 9);
+    if (defaults.barCodeRegex.test(barCodeString)) {
+      const cardId = e.data.slice(0, defaults.barCodeNumLength);
       const newSampleDate = new Date();
       setBarCodeId(cardId);
       setSampleDate(newSampleDate);
diff --git a/components/LineCount.tsx b/components/LineCount.tsx
index fca3cde..1907dcf 100644
--- a/components/LineCount.tsx
+++ b/components/LineCount.tsx
@@ -1,8 +1,7 @@
-import {ButtonProps, InputLineCountScreenProps} from '../models/ElementProps';
 import React, {ReactElement, useState} from 'react';
 import {View} from 'react-native';
-import {DefaultTheme, Subheading, Title, RadioButton, Paragraph, TextInput, HelperText, Button} from 'react-native-paper';
-import {TextInput as NumberInput} from 'react-native';
+import {Button, DefaultTheme, HelperText, Subheading, TextInput, Title} from 'react-native-paper';
+import {ButtonProps, InputLineCountScreenProps} from '../models/ElementProps';
 import {colors, styles} from './Styles';
 
 export const InputLineCountButton = (props: ButtonProps): ReactElement => {
diff --git a/components/Scan.tsx b/components/Scan.tsx
index 7771ec3..e7d06e2 100644
--- a/components/Scan.tsx
+++ b/components/Scan.tsx
@@ -2,6 +2,7 @@ import {BarCodeScanner} from 'expo-barcode-scanner';
 import React, {ReactElement, useState} from 'react';
 import {Text, View} from 'react-native';
 import {Button, DefaultTheme, HelperText, Subheading, TextInput, Title} from 'react-native-paper';
+import {defaults} from '../config/default';
 import {ButtonProps, ElementProps, InputInitialsProps, ScannerProps} from '../models/ElementProps';
 import {colors, styles} from './Styles';
 
@@ -56,9 +57,8 @@ export const InputIdButton = (props: ButtonProps): ReactElement => {
 
 export const IdNumberInput = (props: ScannerProps): ReactElement => {
   const [inputStr, setInputStr] = useState<string>('');
-  const pattern = /^[\d]{9}$/;
   const hasErrors = () => {
-    return !pattern.test(inputStr);
+    return !defaults.barCodeRegex.test(inputStr);
   };
 
   const onSubmit = () => {
@@ -81,7 +81,7 @@ export const IdNumberInput = (props: ScannerProps): ReactElement => {
         keyboardType="numeric"
       />
       <HelperText type="error" visible={hasErrors()}>
-        ID number must be exactly 9 digits. No other characters are allowed.
+        ID number must be exactly {defaults.barCodeNumLength} digits. No other characters are allowed.
       </HelperText>
       <Button
         icon="check"
diff --git a/config/default.tsx b/config/default.tsx
index a8e66a7..2629a72 100644
--- a/config/default.tsx
+++ b/config/default.tsx
@@ -23,4 +23,7 @@ export const defaults: AppDefaults = {
   locationId: '0000',                                   // Default location ID. Can be overridden by user setting.
   lineCountRegex: /^[\d]{4}-[\d]{12}$/,                 // ID format for Line Count records.
   qrCodeRegex: /^[\d]{9}-[a-zA-Z]+-[\d]{12}-[\d]{4}$/,  // ID format for QR Code records.
+  barCodeNumLength: 9,                                  // Number of digits in Bar Code.
+  barCodeRegex: /^[\d]{14}$|^[\d]{9}$/,                 // Pattern for Bar Code data. Scanned barcodes will be either 9 or 14 digits long.
+                                                        // Manually-entered ID numbers will be exactly 9 digits long.
 }
diff --git a/config/example.tsx b/config/example.tsx
index 684180a..6be0033 100644
--- a/config/example.tsx
+++ b/config/example.tsx
@@ -27,4 +27,7 @@ export const defaults: AppDefaults = {
   locationId: '0000',                                   // Default location ID. Can be overridden by user setting.
   lineCountRegex: /^[\d]{4}-[\d]{12}$/,                 // ID format for Line Count records.
   qrCodeRegex: /^[\d]{9}-[a-zA-Z]+-[\d]{12}-[\d]{4}$/,  // ID format for QR Code records.
+  barCodeNumLength: 9,                                  // Number of digits in Bar Code.
+  barCodeRegex: /^[\d]{14}$|^[\d]{9}$/,                 // Pattern for Bar Code data. Scanned barcodes will be either 9 or 14 digits long.
+                                                        // Manually-entered ID numbers will be exactly 9 digits long.
 }
diff --git a/models/Default.tsx b/models/Default.tsx
index 82fad25..a834d93 100644
--- a/models/Default.tsx
+++ b/models/Default.tsx
@@ -10,4 +10,6 @@ export interface AppDefaults {
   locationId: string;
   lineCountRegex: RegExp;
   qrCodeRegex: RegExp;
+  barCodeRegex: RegExp;
+  barCodeNumLength: number;
 }