Scosche

24-HOUR BATTERY LIFE – Equipped with a heavy-duty, rechargeable battery that allows you to work out for up to 24 hours. The Rhythm24 features an IP68 construction that’s sweatproof and waterproof for excellent performance in dry and wet conditions.
POWERED BY PERFORMTEK – Engineered with Valencell’s PerformTek sensor technology. Green and yellow optical sensors provide highly accurate measurement across all skin tones. Precise assessments allow you to improve your performance during activities.
COMPATIBLE WITH OVER 200+ APPS – Built-in Bluetooth SMART and ANT+ technology lets you stream fitness data in real time to any compatible iPhone and Android apps. Connect with bike computers, fitness watches, and exercise equipment.