Retro Hi-Fi Wireless Headphone 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: 5.3 Wireless distance: 10M Battery:300mAh Speaker size: 40mm; Frequency： 2402-2480HZ; Frequency response range： 20-20000HZ Sensitivity:118±3dB; Impedance:32Ω Call time： 30H Standby time:50H; Charge time: 2.5H（ Type-C） Music Playtime:15H(100% volume); 37.5H(60% volume）.