Hurricane H-Turbine Bluetooth 4.1 HeadphoneCustomize a Bluetooth 4.1 Headphone delighting the world.After massive marketing research， Bluedio found current headphones existing in the market has lots of common defects， such as serious noise， sounds flat without passion， low cost-effective and stuffy appearance etc. Obviously， it can't meet the expectation of hardcore music lovers. For this reason， Bluedio keep hard working on 3 years of R&D and testing， manage to manufacturing a customize wireless headphone with unrivaled timbre， adapted to a variety of rugged circumstances， with everlasting popular hue to show your style， and high cost-effective. This is why Hurricane series H-Turbine Bluetooth 4.1 headphone was made. Thus， H-Turbine is compatible with iOS， Android， and Windows， merely 40ms audio latency breakthrough defects of sound and picture are not synchronized while watching movie via Bluetooth.Technical specification:Drivers: 57mm speaker X 2Transducer type: dynamicBluetooth version: V4.1Frequency range: 2.4GHz-2.48GHzOperating distance: up to 10m (free space)Bluetooth profiles: A2DP、AVRCP、HSP、HFPImpedance: 16ΩFrequency response: 20Hz-20kHzSensitivity: 110dBDistortion:<0.1%(THD) Talk time: up to 45 hoursStandby time: up to 1625 hoursCharging time: about 2 hoursOperational temperature: -10 to 50°C