Features: ECG Accurate Heart Rate Get in the zone. Get better calorie estimates and track your intensity level by holding a button. Check your effort level by measuring your heart rate without a chest strap. Simply press and hold a button and see the ECG wave reference and percent of max heart rate right on display. Previous recorded heart rate will show while the LifeTrak Brite R450 calculates your current heart rate. Multiple measurements stored. LightTrak Brighten your day. Proper exposure to natural light enhances mood, energy and sleep. Tracks ambient and blue light levels and alerts you for optimal exposure. Enable yourself to make the most of your day and get your best nights rest by tracking your exposure to both ambient and blue light levels. Notifies you if you need more natural light to start your day or less before you head to bed. LifeTrak Brite R450 leverages its advanced light spectrum sensor and algorithms to monitor both your overall light and blue light exposure levels. Use the LifeTrak app to view your light exposure data over time and compare to your activity and sleep. Notifications* Stay on course. See fitness alerts and preview social messages on your wrist. Reminders, IM, SMS, emails, calls and more. Stay motivated with fitness notifications that spark you to get more active or get more or less light. Stay in the loop with social notifications from your family, friends, calendar and your favorite apps. Pair Brite R450 with the LifeTrak app once and automatically get notifications right on your wrist. Bright R450 stores up to 20 notifications. Quickly interpret notifications because LifeTrak Brite R450 uses distinct icons for many notification types: IM, SMS, emails, incoming calls, missed calls, reminders, RSS/news, general. Customize which notification types, from your smartphone's message center, appears on your wrist, through the LifeTrak app. SleepTrak 2.0 Awake refreshed. Auto sleep, nap and wake detection. Intelligent Wake Up monitors your sleep quality wakes you at your optimal time. Rest easy without needing to tell the LifeTrak Brite R450 you're going to sleep or waking up. Intelligent Wake Up uses a gentle vibrating alarm and your real-time sleep quality data to wake you in the time window of your choice and when you are not in deep sleep. Advanced wrist-off detection enables LifeTrak Brite R450 to record both sleep and naps Review your sleep quality data to help you improve your night's rest. LifeTrak Brite R450 monitors your sleep quality based on motion, arm posture, ambient light and advanced wrist-off detection. Precise Tracking Know your numbers. Automatically tracks all day calorie burn, steps, distance and workouts. Stores data up to seven days on wrist. Advanced Calorie Tracking. Get personalized all-day calorie-burn data to get a more accurate picture of your progress. Calories burned are calculated by your heart rate readings, activity, and personal statistics. Step Count & Distance Calculation. Get a better picture of your progress with accurate step count and distance measurement. Uses a 50-60 step buffer to filter out false steps by making sure you are really walking, before updating the count. Adjusts to walking, jogging, or running through a patented pace-based algorithm. App Connected* Think long term. View detailed charts. Review more than a year of data. Store all your data, get deeper insight and view long term trends using the LifeTrak app. Transfer data from the Brite R450 to your compatible Smartphone and tablets with a push of a button.* Long Battery Life & Waterproof Wear it anytime and anywhere without recharging. No Charging Waterproof to 30 meters. Customizable ComfortFit Bands Personalize to your style. Reversible/interchangeable bands and additional colors available. Always On Info at a glance. Instantly view daily progress and review hourly and weekly data. 7-Day and Hourly Records On the Wrist ?Conveniently see your progress and data charts without pulling out your Smartphone. Use the generous sized display and buttons for easy navigation; data is stored for seven days. *Compatible with: iOS 7 and higher devices: iPhone 4S, 5, 5C, 5S, 6, 6 Plus; iPad 4; iPad Air; iPad Mini, Retina; iPod Touch 5. Select Android devices (OS versions 4.3.x, 4.4.x, 5.0.X): Samsung Galaxy S6, Samsung Galaxy 5, Samsung Galaxy 4, Note III, LGNexus 5, HTC One M8 and Motorola Moto G. Please note: For owners of Samsung Galaxy S5 and Note III, the connectivity problems you experience with Move C300 and Zone C410/C410w is a known issue with Bluetooth and Android 5.0 for your phone. We know our Move C300 and Zone C410/C410w works well with Samsung Galaxy S6 and Android 5.0.2. So, we all will need to wait for Samsung to fix the issue in their next update of Android 5.0 for S5, and Note III. See the Get Connected page for the latest information. Technical Details: Heart rate: 30-240 bpm Workout Mode: Chronograph range: 9 hr, 59 min, 59 sec Calorie: 0-99, 999 Steps: 0-99, 999 steps Distance: 0-621.3 mi / 0-999.9 km Time: AM, PM, hour, minute, seconds 12/24 hour format User Setup: Gender: M/F Age range: 5-99 years Height (in/cm) range: 40-84 in / 100-220 cm Weight (lb/kg) range: 44-440 lb / 20-200kg Step sensitivity Battery: Replaceable coin cell CR2032 Water Resistance: Submersible: 30 m Warranty: One (1) year; excluding battery Dimensions: Total length with adjustable band (max): 217mm Watch head size (diameter): 42 mm LCD size (diameter): 27mm Additional: Backlight Adjustable and durable polyurethane band with SureSnap Clasp locking mechanism for easy closure Impact resistant polycarbonate lens Reliable shock tested to 8kV Contact and 15kV Air (IEC6100-4-2) FCC, CE, ROHS compliant Warranty: In the unlikely event that you have a problem with your purchase please look at our terms and conditions which sets out how you to make a return under warranty. Legal Disclaimer: We are not the manufacturer of the products sold on this site. Actual product packaging and materials may contain more and different information than what is shown on our website. We recommend that you do not rely solely on the information presented on our website. Please always read labels, warnings, and directions provided with the product before using or consuming the product. Please see our full terms and conditions