- 12 months warranty Model: WH-CH720N ~ The built-in V1 processor and dual noise sensor technology allow you to fully immerse yourself in the music. Up to 35 hours of use time, bringing you an all-day listening experience. Lightweight and comfortable to carry. DSEE digital sound enhancement technology can restore the high-frequency sound effect and subtle fade-out sound effect lost during compression. Make crystal-clear hands-free calls and use voice assistants with ease. ~ Support Android and iOS (Whatsapp and Wechat message notifications) Version：v5.2 Bluetooth Profile : A2D, AVRCP, HFP, HSP (Continuous music playback time)：Max. 35 hours(NC ON), Max. 50 hours(NC OFF) (Continuous communication time): Max. 35 hours(NC ON), Max. 40 hours(NC OFF) Frequency Response : 7 Hz - 20,000 Hz (JEITA) Frequency Response (Active Operation) : 7 Hz - 20,000 Hz (JEITA) Frequency Response (Bluetooth Communication) : 20Hz-20,000Hz (44.1kHz sampling) Accessories: Headphones, Cables, USB cables ~ - Sony - Parallel Import - Return and refund are not accept. - Free shipping to HK/Macau when spending over $500 onwards - China area shipping fee $130 + Local SF Express - Two business day shipping. Sent via SF express / JD Logistics - Exchange of defective units purchased in 7 days - 12 months warranty ~ *Photo for reference only