diff --git a/index.html b/index.html
index 9943dbe..65a2dec 100644
--- a/index.html
+++ b/index.html
@@ -15,7 +15,16 @@
 <body>
 <div id="clock"></div>
 <script>
-	const throttle = 8;
+	const parseIntDefault = (str, def) => {
+		const num = parseInt(str, 10);
+		if (isFinite(num)) {
+			return num;
+		}
+		
+		return def;
+	};
+	
+	const throttle = Math.max(0, parseIntDefault(window.location.search.slice(1), 0));
 	const div = document.getElementById('clock');
 	const text = document.createTextNode('');
 	div.appendChild(text);
diff --git a/readme.md b/readme.md
index 44b829b..1693096 100644
--- a/readme.md
+++ b/readme.md
@@ -1,3 +1,10 @@
 # Microsecond resolution clock
 
-https://csimi.github.io/microclock
+https://csimi.github.io/microclock/
+
+## Features
+
+- throttle using search string (for example `?8`)
+- scales to viewport
+- no GDPR consent popup
+- no header or anything that can get in the way
