Close-fitting, noise-canceling earbuds with a heart rate monitor. Flexible, secure ear hooks provide comfort and stability. Updated acoustic architecture and custom spatial sound with dynamic head tracking. Integrated heart rate monitor for training. The optical LED sensors of the heart rate monitor pulse over 100 times per second to measure blood flow and provide athletes with real-time performance data. Active noise cancellation, transparency mode, and adaptive EQ. The adaptive EQ adjusts the sound based on the fit and seal of your earbuds using inward-facing microphones. Up to 45 hours of battery life with a wireless charging case. Equipped with a powerful Apple H2 chip. Fully compatible with Apple devices: supports one-touch pairing, automatic switching, audio sharing, as well as Siri and "Find My Device" features. Android users can access one-touch pairing, heart rate monitor, custom controls, battery status, and the "Find My Beats" feature through the Beats app. Sweat and water-resistant (IPX4 rating) earbuds. Note: USB-C to USB-C cable is not included. Package includes: Powerbeats Pro 2 earbuds, charging case, quick start guide, warranty card, and ear tips in sizes XS, S, M, L, and XL.