Rainbow 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: V5.0+EDR Transmission Range: 10M Listening/Playing Time: 4 Hours Charging Time: 1.5 Hour; Battery Type: 200mAh Rechargeable Lithium Battery; Speaker Diameter: Ø40mm.