diff --git a/mapper/package.json b/mapper/package.json
index da41c87..8d0ec7d 100644
--- a/mapper/package.json
+++ b/mapper/package.json
@@ -15,6 +15,7 @@
     "react-dom": "^17.0.2",
     "react-is": "^17.0.2",
     "react-leaflet": "^4.2.1",
+    "react-range-slider-input": "^3.0.7",
     "react-scripts": "4.0.3",
     "web-vitals": "^1.0.1"
   },
@@ -31,8 +32,8 @@
     ]
   },
   "browserslist": [
-	     ">0.2%",
-		   "not dead",
-		     "not op_mini all"
+    ">0.2%",
+    "not dead",
+    "not op_mini all"
   ]
 }
diff --git a/mapper/src/App.css b/mapper/src/App.css
index 65f533d..73aa191 100644
--- a/mapper/src/App.css
+++ b/mapper/src/App.css
@@ -39,6 +39,16 @@ h2 {
 	z-index: 9999;
 }
 
+.time-slider {
+	padding: 1em 0.5em;
+}
+
+.range {
+	color: white;
+	text-align: center;
+	padding: 0.5rem;
+}
+
 .submenu {
 	background-color: #666;
 	max-width: 40em;
diff --git a/mapper/src/App.js b/mapper/src/App.js
index 58cc4cf..300b414 100644
--- a/mapper/src/App.js
+++ b/mapper/src/App.js
@@ -5,35 +5,23 @@ import Datetime from 'react-datetime';
 import 'react-datetime/css/react-datetime.css';
 import axios from 'axios';
 import moment from 'moment-timezone';
+import RangeSlider from 'react-range-slider-input';
 import './App.css';
 import 'leaflet/dist/leaflet.css';
+import 'react-range-slider-input/dist/style.css';
+
 
 let tzcache = {};
 
+// num: number of steps per duration
+// secs: number of seconds per step
 const durations = [
-	{id: 0, len: 'Day', win: '1m', full: '1 min', delta: [1, 'days'], format: 'HH'},
-	{id: 1, len: 'Week', win: '3m', full: '3 min', delta: [7, 'days'], format: 'HH'},
-	{id: 2, len: 'Week', win: '10m', full: '10 min', delta: [7, 'days'], format: 'HH'},
-	{id: 3, len: 'Month', win: '10m', full: '10 min', delta: [1, 'months'], format: 'D'},
-	{id: 4, len: 'Month', win: '1h', full: '1 hour', delta: [1, 'months'], format: 'D'},
-	{id: 5, len: 'Year', win: '2h', full: '2 hours', delta: [1, 'years'], format: 'M/D'},
-	{id: 6, len: 'Year', win: '1d', full: '1 day', delta: [1, 'years'], format: 'M/D'},
+	{id: 0, len: 'Day', win: '1m', full: '1 min', delta: [1, 'days'], format: 'HH', num: 1440, secs: 60},
+	{id: 1, len: 'Week', win: '3m', full: '3 min', delta: [7, 'days'], format: 'HH', num: 3360, secs: 180},
+	{id: 2, len: 'Month', win: '10m', full: '10 min', delta: [1, 'months'], format: 'D', num: 4380, secs: 600},
+	{id: 3, len: 'Year', win: '2h', full: '2 hour', delta: [1, 'years'], format: 'M/D', num: 4380, secs: 7200},
 ];
 
-const units = {
-	'PM10': ' ug/m³',
-	'PM2.5': ' ug/m³',
-	'VOC': ' / 500',
-	'CO2': ' ppm',
-	'Energy': ' kWh',
-	'Power': ' W',
-	'Temperature': ' °C',
-	'Humidity': '%',
-	'Setpoint': ' °C',
-	'State': '',
-	'Lux': ' lx',
-};
-
 function useSensor(measurement, name, end, duration) {
 	const [data, setData] = useState(false);
 	const [loading, setLoading] = useState(false);
@@ -63,10 +51,10 @@ function useSensor(measurement, name, end, duration) {
 
 
 
-function Owntracks({end, duration}) {
+function Owntracks({end, duration, range}) {
 	const [data, loading] = useSensor('owntracks', 'OwnTracks', end, duration);
 
-	const coords = data.length ? data.map(({ lat, lon }) => [lat, lon]).filter(([lat, lon]) => lat !== null || lon !== null) : [];
+	const coords = data.length ? data.filter(x => !range || (x.time >= range[0] && x.time <= range[1])).map(({ lat, lon }) => [lat, lon]).filter(([lat, lon]) => lat !== null || lon !== null) : [];
 
 	const handleSubmit = (e) => {
 		e.preventDefault();
@@ -102,79 +90,122 @@ function Owntracks({end, duration}) {
 }
 
 
-function Graphs({end, duration}) {
+function Graphs({end, duration, range}) {
 	return (
 		<div className='container'>
-			<Owntracks end={end} duration={duration} />
+			<Owntracks end={end} duration={duration} range={range} />
 		</div>
 	);
 }
 
-function Menu({duration, setDuration, end, setEnd}) {
+function Menu({duration, setDuration, end, setEnd, range, setRange}) {
 	const [submenu, setSubmenu] = useState(false);
+	const [showRange, setShowRange] = useState(false);
 
 	const chooseDuration = (x) => {
 		setSubmenu(false);
+		setRange(false);
 		setDuration(x);
 	};
 
 	const chooseEnd = (x) => {
 		setSubmenu(false);
 		const newEnd = x.add(...duration.delta);
+		setRange(false);
 		setEnd(newEnd);
 	};
 
 	const chooseNow = (x) => {
 		setSubmenu(false);
+		setRange(false);
 		setEnd(moment());
 	};
 
 	const next = () => {
 		setSubmenu(false);
+		setRange(false);
 		setEnd(prevEnd => moment(prevEnd).add(...duration.delta));
 	}
 
 	const prev = () => {
 		setSubmenu(false);
+		setRange(false);
 		setEnd(prevEnd => moment(prevEnd).subtract(...duration.delta));
 	}
 
+	const onSlider = (slider) => {
+		console.log(slider);
+		// good luck remembering how this works
+		const lowOffset = slider[0] * duration.secs - duration.num * duration.secs;
+		const highOffset = slider[1] * duration.secs - duration.num * duration.secs;
+
+		const low = moment.unix(end.unix() + lowOffset);
+		const high = moment.unix(end.unix() + highOffset);
+
+		const lowStr = low.utc().format('YYYY-MM-DDTHH:mm:ss[Z]');
+		const highStr = high.utc().format('YYYY-MM-DDTHH:mm:ss[Z]');
+
+		console.log(lowStr, highStr);
+		setRange([lowStr, highStr]);
+
+	}
+
 	return (
 		<div className='menu'>
-			{!!submenu &&<div className='submenu'>
-				{submenu === 'end' &&
-					<>
-						<div className='submenu-header'>
-							<h2>Choose start date:</h2>
-							<button onClick={() => setSubmenu(false)}>×</button>
-						</div>
-
-						<div className='datepicker'>
-							<Datetime
-								input={false}
-								timeFormat={false}
-								onChange={(x) => chooseEnd(x)}
-							/>
-						</div>
-
-						<button onClick={chooseNow}>Jump to Now</button>
-					</>
-				}
-
-				{submenu === 'duration' &&
-					<>
-						<div className='submenu-header'>
-							<h2>Choose duration:</h2>
-							<button onClick={() => setSubmenu(false)}>×</button>
-						</div>
-
-						{durations.map(x =>
-							<button key={x.id} onClick={() => chooseDuration(x)}>Last {x.len} / {x.full} data</button>
-						)}
-					</>
-				}
+			{showRange && <div className='range'>
+				{moment(range[0]).format('lll')} - {moment(range[1]).format('lll')}
 			</div>}
 
+			{submenu ?
+				<div className='submenu'>
+					{submenu === 'end' &&
+						<>
+							<div className='submenu-header'>
+								<h2>Choose start date:</h2>
+								<button onClick={() => setSubmenu(false)}>×</button>
+							</div>
+
+							<div className='datepicker'>
+								<Datetime
+									input={false}
+									timeFormat={false}
+									onChange={(x) => chooseEnd(x)}
+								/>
+							</div>
+
+							<button onClick={chooseNow}>Jump to Now</button>
+						</>
+					}
+
+					{submenu === 'duration' &&
+						<>
+							<div className='submenu-header'>
+								<h2>Choose duration:</h2>
+								<button onClick={() => setSubmenu(false)}>×</button>
+							</div>
+
+							{durations.map(x =>
+								<button key={x.id} onClick={() => chooseDuration(x)}>Last {x.len} ({x.full} data)</button>
+							)}
+						</>
+					}
+				</div>
+			:
+				<div className='time-slider'>
+					<RangeSlider
+						min={0}
+						max={duration.num}
+						defaultValue={[0, duration.num]}
+						onInput={onSlider}
+						onThumbDragStart={() => setShowRange(true)}
+						onThumbDragEnd={() => setShowRange(false)}
+						onRangeDragStart={() => setShowRange(true)}
+						onRangeDragEnd={() => setShowRange(false)}
+					/>
+
+				</div>
+			}
+
 			<div className='menu-container'>
 				<button onClick={() => prev()}>&lt;</button>
 
@@ -201,6 +232,7 @@ function Menu({duration, setDuration, end, setEnd}) {
 function App() {
 	const [duration, setDuration] = useState(durations[0]);
 	const [end, setEnd] = useState(moment());
+	const [range, setRange] = useState(false);
 
 	return (
 		<div>
@@ -209,11 +241,14 @@ function App() {
 				setDuration={setDuration}
 				end={end}
 				setEnd={setEnd}
+				range={range}
+				setRange={setRange}
 			/>
 
 			<Graphs
 				end={end}
 				duration={duration}
+				range={range}
 			/>
 		</div>
 	);
diff --git a/mapper/yarn.lock b/mapper/yarn.lock
index a4f8850..07809cc 100644
--- a/mapper/yarn.lock
+++ b/mapper/yarn.lock
@@ -3471,6 +3471,11 @@ cliui@^6.0.0:
     strip-ansi "^6.0.0"
     wrap-ansi "^6.2.0"
 
+clsx@^1.1.1:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/clsx/-/clsx-1.2.1.tgz#0ddc4a20a549b59c93a4116bb26f5294ca17dc12"
+  integrity sha512-EcR6r5a8bj6pu3ycsa/E/cKVGuTgZJZdsyUYHOksG/UHIiKfjxzRxYJpyVBwYaQeOvghal9fcc4PidlgzugAQg==
+
 co@^4.6.0:
   version "4.6.0"
   resolved "https://registry.yarnpkg.com/co/-/co-4.6.0.tgz#6ea6bdf3d853ae54ccb8e47bfa0bf3f9031fb184"
@@ -3710,6 +3715,11 @@ core-js@^2.4.0:
   resolved "https://registry.yarnpkg.com/core-js/-/core-js-2.6.12.tgz#d9333dfa7b065e347cc5682219d6f690859cc2ec"
   integrity sha512-Kb2wC0fvsWfQrgk8HU5lW6U/Lcs8+9aaYcy4ZFc6DDlo4nZ7n70dEgE5rtR0oG6ufKDUnrwfWL1mXR5ljDatrQ==
 
+core-js@^3.22.4:
+  version "3.37.1"
+  resolved "https://registry.yarnpkg.com/core-js/-/core-js-3.37.1.tgz#d21751ddb756518ac5a00e4d66499df981a62db9"
+  integrity sha512-Xn6qmxrQZyB0FFY8E3bgRXei3lWDJHhvI+u0q9TKIYM49G8pAr0FgnnrFRAmsbptZL1yxRADVXn+x5AGsbBfyw==
+
 core-js@^3.6.5:
   version "3.33.0"
   resolved "https://registry.yarnpkg.com/core-js/-/core-js-3.33.0.tgz#70366dbf737134761edb017990cf5ce6c6369c40"
@@ -9512,6 +9522,14 @@ react-leaflet@^4.2.1:
   dependencies:
     "@react-leaflet/core" "^2.1.0"
 
+react-range-slider-input@^3.0.7:
+  version "3.0.7"
+  resolved "https://registry.yarnpkg.com/react-range-slider-input/-/react-range-slider-input-3.0.7.tgz#88ceb118b33d7eb0550cec1f77fc3e60e0f880f9"
+  integrity sha512-yAJDDMUNkILOcZSCLCVbwgnoAM3v0AfdDysTCMXDwY/+ZRNRlv98TyHbVCwPFEd7qiI8Ca/stKb0GAy//NybYw==
+  dependencies:
+    clsx "^1.1.1"
+    core-js "^3.22.4"
+
 react-refresh@^0.8.3:
   version "0.8.3"
   resolved "https://registry.yarnpkg.com/react-refresh/-/react-refresh-0.8.3.tgz#721d4657672d400c5e3c75d063c4a85fb2d5d68f"