45h Long Usage Time Wireless Headphones delivers crisp, balanced sound with reliable wireless performance for work, study, travel, and workouts. Designed for all‑day comfort, it pairs quickly, holds a stable connection, and keeps you focused with clear audio and an ergonomic fit. Perfect for music, calls, and meetings. Key details: Wireless Version:Wireless 5.3 Frequency:2.4GHZ; Working Range:10 meters Playing Music Time:45 hours Talking time:45 hours Charging time: about 1.5 hours; Frequency Response:20-20000Hz Battery: 400mAh.