Hurricane H(Shooting Brake) Bluetooth 4.1 Headphone Ongoing luxurious Bluetooth 4.1 Headphone, delighting the world. Luxurious music enjoyment is always unreachable. For this reason, Bluedio keep hard working on 3 years of R&D and testing, manage to customize a wireless headphone with unrivaled timbre, adapted to a variety of rugged circumstances and highly cost-effective. Thoughtful design, unexpected superior sound, make luxury become reasonable, this is Hurricane H(Shooting Brake) Bluetooth 4.1 headphone. Technical specification: Drivers: 57mm speaker X 2 Transducer type: dynamic Bluetooth version: V4.1 Frequency range: 2.4GHz-2.48GHz Operating distance: up to 10m (free space) Bluetooth profiles: A2DP?AVRCP?HSP?HFP Impedance: 16O Frequency response: 20Hz-20kHz Sensitivity: 110dB Distortion:<0.1%(THD) Talk time: up to 45 hours Standby time: up to 1625 hours Charging time: about 2 hours Operational temperature: -10 to 50°C