STC Earphones New earphones, unopened. Sound Technology Noise Isolation: Reduces background noise and focuses on sound during calls. Adaptive Audio: Combines Active Noise Cancellation and Advanced Transparency, making your voice and the world around you sound more natural and vibrant. Sensors Heart Rate Sensors: Help you track your heart rate and calories burned during workouts. Live Translation: You can listen to people speaking different languages and hear translations directly through your AirPods Pro 3. Conversation Awareness: Can detect when you're talking to someone nearby and automatically lowers the volume of what you're listening to. Control Options H2 Chip Battery Up to 10 hours of battery life in transparency mode with hearing assistance on a single charge. 8 hours of battery life with Active Noise Cancellation enabled.