The Sleep Earbuds 4 Pro closes the loop that every other sleep device leaves open: it both monitors sleep and actively improves it, entirely phone-free. In-ear 100 Hz PPG samples from the vascular-rich ear canal — a positionally stable site that eliminates the motion artifacts corrupting wrist and finger readings — to fuse heart rate, HRV, and respiration into sleep stages and a body-battery score. Crucially, that data drives real-time intervention: adaptive audio adjusts its tempo and volume to guide you back toward rest. The SleepHub™ smart charging case — the industry's only AMOLED touchscreen case with its own chip and onboard storage — keeps the entire bedtime ritual off your phone and auto-pops the morning report when you dock. Thirty-decibel ANC, Twin-Seal isolation, and AI snore-masking complete the system.