diff --git a/index.html b/index.html
index 660ae90..49fbcf5 100644
--- a/index.html
+++ b/index.html
@@ -81,7 +81,9 @@ <h2 class="settings-subtitle">Functionalities</h2>
 			</p>
 			<p class="settings-explain">Writable system image allows for system modifications, such as installing ARM support and Rooting. Changes to system in one virtual device does not affect another.</p>
 			<h2 class="settings-subtitle">Advanced</h2>
+			<wcl-settings-field-text key="preexec" label="Pre-execute command"></wcl-settings-field-text>
 			<wcl-settings-field-text key="emulator_args" label="Extra emulator arguments"></wcl-settings-field-text>
+			<wcl-settings-field-text key="qemu_args" label="Extra qemu arguments"></wcl-settings-field-text>
 			<p class="settings-explain">Advanced users only. Add extra control arguments.</p>
 		</div>
 	</div>
diff --git a/package.json b/package.json
index 7d25c85..a9eaa82 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "avd-launcher",
-  "version": "0.1.2",
+  "version": "0.1.4",
   "main": "main.js",
   "icon": "./icon/launcher.png",
   "scripts": {
diff --git a/static/js/common/settings-data.js b/static/js/common/settings-data.js
index 7f10372..0cc6ad5 100644
--- a/static/js/common/settings-data.js
+++ b/static/js/common/settings-data.js
@@ -38,6 +38,14 @@ module.exports = {
 		validator_arg: ['sdk_root', 'cli_ver'],
 		default: 'latest'
 	},
+	preexec: {
+		type: 'text',
+		validator: () => {
+			return {pass: true, message: 'You can use this to set environment variables.'}
+		},
+		validator_arg: [],
+		default: ''
+	},
 	emulator_args: {
 		type: 'text',
 		validator: () => {
@@ -46,6 +54,14 @@ module.exports = {
 		validator_arg: [],
 		default: ''
 	},
+	qemu_args: {
+		type: 'text',
+		validator: () => {
+			return {pass: true, message: 'Arguments to pass to qemu core.'}
+		},
+		validator_arg: [],
+		default: ''
+	},
 	func_reset_system: {
 		type: 'bool',
 		default: true
diff --git a/static/js/common/virtual-devices.js b/static/js/common/virtual-devices.js
index 3b3281c..e0a2223 100644
--- a/static/js/common/virtual-devices.js
+++ b/static/js/common/virtual-devices.js
@@ -80,7 +80,11 @@ const child_process = require('child_process');
 			if(this.isRunning()) {
 				return {pass: false, error: 'already_running', message: "Emulator is already running."};
 			}
-			let command = `"${emulator_exec}"${useWritableSystem ? ' -writable-system' : ''} ${SettingsProvider.get('emulator_args')} -avd ${this.name}`;
+			let command = `"${emulator_exec}"${useWritableSystem ? ' -writable-system' : ''} ${SettingsProvider.get('emulator_args')} -avd ${this.name} -qemu ${SettingsProvider.get('qemu_args')}`;
+			let preexec = SettingsProvider.get('preexec');
+			if(preexec != '') {
+				command = preexec + '&' + command;
+			}
 			child_process.exec(command);
 			return {pass: true, message: "Emulator launched."};
 		};