📄 Product Description – Promate Serene is a high-definition hybrid ANC over-ear headphone built for immersive listening. It combines advanced Hybrid Active Noise Cancelling with 360° Spatial Audio and Dynamic Head Tracking, plus a crystal-clear microphone and a dual-battery setup for long playback.

⭐ Key Features:
– 🔹 Powerful Hybrid ANC – Up to 35dB noise reduction for better focus during travel, work, or study.
– 🔹 360° Spatial Audio + Dynamic Head Tracking – Panoramic, multi-dimensional audio that stays aligned with your head movement for deeper immersion.
– 🔹 Hi-Fi 40mm Drivers – 40mm speaker diameter, 20Hz–20kHz frequency range, ≥98dB SNR, and 32Ω ±15% impedance for clear, detailed sound.
– 🔹 Modern Bluetooth Connectivity – Bluetooth V5.4 with up to 10m range, Profiles: A2DP/HFP/HSP/AVRCP, 2.402GHz–2.480GHz band, RF output power ≤9dBm.
– 🔹 Clear Calls – Microphone frequency 50Hz–20kHz, -32dB ±2dB sensitivity, 2.2KΩ mic impedance for improved voice clarity.
– 🔹 Dual Battery Long Playback – 400mAh × 2 Li-polymer batteries deliver up to 40H (ANC off) or 28H (ANC on), 85H standby time, ~3.5H charging time, with a 500mm USB-C charging cable.
– 🔹 Comfort & Control – High-density soft foam padding and Digital Crown control (product design dependent) for convenient daily use.

🎯 Closing Paragraph:
Serene is a strong pick if you want over-ear comfort, effective hybrid ANC, and an immersive 360° spatial experience with head tracking—backed by long battery life and reliable Bluetooth performance.

⚠️ Important Note: Actual playtime varies with volume level, ANC usage, and content; Bluetooth range may vary depending on environment.