diff --git a/README.md b/README.md
index fd8bf01..912965b 100644
--- a/README.md
+++ b/README.md
@@ -58,16 +58,16 @@ At any point you want the program to stop, use <kbd>Ctrl</kbd> + <kbd>C</kbd>.
 
 ### Customization
 
-To customize `nvidia-snatcher`, make a copy of `.env-example` as `.env` and make any changes to your liking. _Note that all environment variables are **optional**._
+To customize `nvidia-snatcher`, make a copy of `.env-example` as `.env` and make any changes to your liking. _All environment variables are **optional**._
 
 Here is a list of variables that you can use to customize your newly copied `.env` file:
 
 | **Environment variable** | **Description** | **Notes** |
 |:---:|---|---|
 | `BROWSER_TRUSTED` | Skip Chromium Sandbox | Useful for containerized environments, default: `false` |
-| `DESKTOP_NOTIFICATIONS` | Display desktop notifications using [node-notifier](https://www.npmjs.com/package/node-notifier); optional | Default: `false` |
-| `DISCORD_NOTIFY_GROUP` | Discord group you would like to notify; optional | E.g.: `<@2834729847239842>` |
-| `DISCORD_WEB_HOOK` | Discord Web Hook URL | |
+| `DESKTOP_NOTIFICATIONS` | Display desktop notifications using [node-notifier](https://www.npmjs.com/package/node-notifier) | Default: `false` |
+| `DISCORD_NOTIFY_GROUP` | Discord group you would like to notify | Can be comma separated, use role ID, E.g.: `<@2834729847239842>` |
+| `DISCORD_WEB_HOOK` | Discord Web Hook URL | Can be comma separated, use whole webhook URL |
 | `EMAIL_USERNAME` | Gmail address | E.g.: `jensen.robbed.us@gmail.com` |
 | `EMAIL_PASSWORD` | Gmail password | See below if you have MFA |
 | `HEADLESS` | Puppeteer to run headless or not | Debugging related, default: `true` |
diff --git a/src/config.ts b/src/config.ts
index 2328bfa..3568386 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -6,12 +6,52 @@ import path from 'path';
 
 config({path: path.resolve(__dirname, '../.env')});
 
+/**
+ * Returns environment variable, given array, or default array.
+ *
+ * @param environment Interested environment variable.
+ * @param array Default array. If not set, is `[]`.
+ */
+function envOrArray(environment: string | undefined, array?: string[]): string[] {
+	return environment ? environment.split(',') : (array ?? []);
+}
+
+/**
+ * Returns environment variable, given boolean, or default boolean.
+ *
+ * @param environment Interested environment variable.
+ * @param boolean Default boolean. If not set, is `true`.
+ */
+function envOrBoolean(environment: string | undefined, boolean?: boolean): boolean {
+	return environment ? environment === 'true' : (boolean ?? true);
+}
+
+/**
+ * Returns environment variable, given string, or default string.
+ *
+ * @param environment Interested environment variable.
+ * @param string Default string. If not set, is `''`.
+ */
+function envOrString(environment: string | undefined, string?: string): string {
+	return environment ? environment : (string ?? '');
+}
+
+/**
+ * Returns environment variable, given number, or default number.
+ *
+ * @param environment Interested environment variable.
+ * @param number Default number. If not set, is `0`.
+ */
+function envOrNumber(environment: string | undefined, number?: number): number {
+	return Number(environment ?? (number ?? 0));
+}
+
 const browser = {
-	isHeadless: process.env.HEADLESS ? process.env.HEADLESS === 'true' : true,
-	isTrusted: process.env.BROWSER_TRUSTED ? process.env.BROWSER_TRUSTED === 'true' : false,
-	maxSleep: Number(process.env.PAGE_SLEEP_MAX ?? 10000),
-	minSleep: Number(process.env.PAGE_SLEEP_MIN ?? 5000),
-	open: process.env.OPEN_BROWSER ? process.env.OPEN_BROWSER === 'true' : true
+	isHeadless: envOrBoolean(process.env.HEADLESS),
+	isTrusted: envOrBoolean(process.env.BROWSER_TRUSTED, false),
+	maxSleep: envOrNumber(process.env.PAGE_SLEEP_MAX, 10000),
+	minSleep: envOrNumber(process.env.PAGE_SLEEP_MIN, 5000),
+	open: envOrBoolean(process.env.OPEN_BROWSER)
 };
 
 const logLevel = process.env.LOG_LEVEL ?? 'info';
@@ -19,12 +59,12 @@ const logLevel = process.env.LOG_LEVEL ?? 'info';
 const notifications = {
 	desktop: process.env.DESKTOP_NOTIFICATIONS === 'true',
 	discord: {
-		notifyGroup: process.env.DISCORD_NOTIFY_GROUP ?? '',
-		webHookUrl: process.env.DISCORD_WEB_HOOK ?? ''
+		notifyGroup: envOrArray(process.env.DISCORD_NOTIFY_GROUP),
+		webHookUrl: envOrArray(process.env.DISCORD_WEB_HOOK)
 	},
 	email: {
-		password: process.env.EMAIL_PASSWORD ?? '',
-		username: process.env.EMAIL_USERNAME ?? ''
+		password: envOrString(process.env.EMAIL_PASSWORD),
+		username: envOrString(process.env.EMAIL_USERNAME)
 	},
 	phone: {
 		availableCarriers: new Map([
@@ -36,47 +76,46 @@ const notifications = {
 			['tmobile', 'tmomail.net'],
 			['verizon', 'vtext.com']
 		]),
-		carrier: process.env.PHONE_CARRIER ?? '',
-		number: process.env.PHONE_NUMBER ?? ''
+		carrier: envOrString(process.env.PHONE_CARRIER),
+		number: envOrString(process.env.PHONE_NUMBER)
 	},
-	playSound: process.env.PLAY_SOUND ?? '',
-	pushBulletApiKey: process.env.PUSHBULLET ?? '',
+	playSound: envOrString(process.env.PLAY_SOUND),
+	pushBulletApiKey: envOrString(process.env.PUSHBULLET),
 	pushover: {
-		token: process.env.PUSHOVER_TOKEN ?? '',
-		username: process.env.PUSHOVER_USER ?? ''
+		token: envOrString(process.env.PUSHOVER_TOKEN),
+		username: envOrString(process.env.PUSHOVER_USER)
 	},
 	slack: {
-		channel: process.env.SLACK_CHANNEL ?? '',
-		token: process.env.SLACK_TOKEN ?? ''
+		channel: envOrString(process.env.SLACK_CHANNEL),
+		token: envOrString(process.env.SLACK_TOKEN)
 	},
 	telegram: {
-		accessToken: process.env.TELEGRAM_ACCESS_TOKEN ?? '',
-		chatId: process.env.TELEGRAM_CHAT_ID ?? ''
+		accessToken: envOrString(process.env.TELEGRAM_ACCESS_TOKEN),
+		chatId: envOrString(process.env.TELEGRAM_CHAT_ID)
 	},
-	test: process.env.NOTIFICATION_TEST === 'true',
 	twitter: {
-		accessTokenKey: process.env.TWITTER_ACCESS_TOKEN_KEY ?? '',
-		accessTokenSecret: process.env.TWITTER_ACCESS_TOKEN_SECRET ?? '',
-		consumerKey: process.env.TWITTER_CONSUMER_KEY ?? '',
-		consumerSecret: process.env.TWITTER_CONSUMER_SECRET ?? '',
-		tweetTags: process.env.TWITTER_TWEET_TAGS ?? ''
+		accessTokenKey: envOrString(process.env.TWITTER_ACCESS_TOKEN_KEY),
+		accessTokenSecret: envOrString(process.env.TWITTER_ACCESS_TOKEN_SECRET),
+		consumerKey: envOrString(process.env.TWITTER_CONSUMER_KEY),
+		consumerSecret: envOrString(process.env.TWITTER_CONSUMER_SECRET),
+		tweetTags: envOrString(process.env.TWITTER_TWEET_TAGS)
 	}
 };
 
 const page = {
-	capture: process.env.SCREENSHOT ? process.env.SCREENSHOT === 'true' : 'true',
 	height: 1080,
-	inStockWaitTime: Number(process.env.IN_STOCK_WAIT_TIME ?? 0),
-	navigationTimeout: Number(process.env.PAGE_TIMEOUT ?? 30000),
-	userAgent: process.env.USER_AGENT ?? 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Safari/537.36',
+	inStockWaitTime: envOrNumber(process.env.IN_STOCK_WAIT_TIME),
+	navigationTimeout: envOrNumber(process.env.PAGE_TIMEOUT, 30000),
+	screenshot: envOrBoolean(process.env.SCREENSHOT),
+	userAgent: envOrString(process.env.USER_AGENT, 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Safari/537.36'),
 	width: 1920
 };
 
 const store = {
-	country: process.env.COUNTRY ?? 'usa',
-	showOnlyBrands: process.env.SHOW_ONLY_BRANDS ? process.env.SHOW_ONLY_BRANDS.split(',') : [],
-	showOnlySeries: process.env.SHOW_ONLY_SERIES ? process.env.SHOW_ONLY_SERIES.split(',') : ['3070', '3080', '3090'],
-	stores: process.env.STORES ? process.env.STORES.split(',') : ['nvidia']
+	country: envOrString(process.env.COUNTRY, 'usa'),
+	showOnlyBrands: envOrArray(process.env.SHOW_ONLY_BRANDS),
+	showOnlySeries: envOrArray(process.env.SHOW_ONLY_SERIES, ['3070', '3080', '3090']),
+	stores: envOrArray(process.env.STORES, ['nvidia'])
 };
 
 export const Config = {
diff --git a/src/notification/discord.ts b/src/notification/discord.ts
index 3918f77..0c5601b 100644
--- a/src/notification/discord.ts
+++ b/src/notification/discord.ts
@@ -3,7 +3,7 @@ import {MessageBuilder, Webhook} from 'discord-webhook-node';
 import {Config} from '../config';
 import {Logger} from '../logger';
 
-const hook = new Webhook(Config.notifications.discord.webHookUrl);
+const hooks = Config.notifications.discord.webHookUrl;
 const notifyGroup = Config.notifications.discord.notifyGroup;
 
 export function sendDiscordMessage(link: Link, store: Store) {
@@ -17,12 +17,18 @@ export function sendDiscordMessage(link: Link, store: Store) {
 			embed.addField('Model', link.model, true);
 
 			if (notifyGroup) {
-				embed.setText(notifyGroup);
+				embed.setText(notifyGroup.join(' '));
 			}
 
 			embed.setColor(0x76B900);
 			embed.setTimestamp();
-			await hook.send(embed);
+
+			const promises = [];
+			for (const hook of hooks) {
+				promises.push(new Webhook(hook).send(embed));
+			}
+
+			await Promise.all(promises);
 
 			Logger.info('✔ discord message sent');
 		} catch (error) {
diff --git a/src/store/lookup.ts b/src/store/lookup.ts
index 1bb49f2..6e4e57a 100644
--- a/src/store/lookup.ts
+++ b/src/store/lookup.ts
@@ -39,6 +39,7 @@ function filterSeries(series: Link['series']) {
  * Responsible for looking up information about a each product within
  * a `Store`. It's important that we ignore `no-await-in-loop` here
  * because we don't want to get rate limited within the same store.
+ *
  * @param browser Puppeteer browser.
  * @param store Vendor of graphics cards.
  */
@@ -94,7 +95,7 @@ async function lookupCard(browser: Browser, store: Store, page: Page, link: Link
 			}, 1000 * Config.page.inStockWaitTime);
 		}
 
-		if (Config.page.capture) {
+		if (Config.page.screenshot) {
 			Logger.debug('ℹ saving screenshot');
 
 			link.screenshot = `success-${Date.now()}.png`;