Dual Optical Sensors
Motion-Detecting Accelerometer
Speech-Detecting Accelerometer
Apple H1 Chip
Dual Beam-forming Microphones
Active Noise Cancellation
Transparency Mode
Adaptive EQ
Vent System for Pressure Equalization
Custom High-Excursion Apple Driver
Custom High Dynamic Range Amplifier
Inward-Facing Microphone
Force Sensor
Hands-free Function
Voice-enabled Siri Access
