I have no idea what this item does and just randomly won it. selling brand new and never opened. 

Still sealed in original plastic

FREE SHIPPING.

KardiaMobile 1-Lead EKG Monitor, Medical-Grade FDA-Cleared Personal Heart Monitor, Detects Normal, AFib & Arrhythmias, Unlimited Recordings, 30 Second Results, Works with most Smartphones, Pocket-size

currently $74 on amazon

• On-the-Go Accurate EKG: Capture a single lead medical-grade electrocardiogram in just 30 seconds with the pocket-sized KardiaMobile EKG Monitor. Download the free Kardia app and record an EKG on your smartphone or tablet anytime and anywhere.
• Clear Results: EKG detects Atrial Fibrillation, Tachycardia, Bradycardia and Normal Sinus Rhythm and displays easy-to-read result. Email EKG to your doctor or anyone. Add KardiaCare subscription for additional heart rhythm detections, doctor reviews of your EKG, and more. Subscription requires additional fee.
• Simple to Use Without a Subscription: No Bluetooth, Wi-Fi, cords or PC needed. Place the device near your smartphone. Monitor your heart by placing your fingers or thumbs on the silver KardiaMobile EKG sensors. Know in 30 seconds whether your heart rhythm is normal.
• Pocket-size Peace of Mind: Weighs less than 1 ounce, KardiaMobile is small enough to take anywhere. Ideal for home, office, gym or outdoors. FSA/HSA-eligible and FDA-cleared cardio mobile device gives you answers quickly and easily.
• #1 Cardiologist Recommended Personal EKG brand: Recommended by cardiologists worldwide, with over 350 million EKGs recorded, recipient of health technology awards, trusted by leading hospitals and healthcare providers. A gift worthy of giving.
• KardiaMobile is not tested or recommended for use with pacemakers and ICDs. KardiaMobile does not check for heart attack and does not replace regular health checkups. Seek medical attention if you are experiencing any concerning symptoms or a medical emergency. Powered by a replaceable CR2016 battery that lasts up to two years with 2-3 EKGs per day.