Feature:
Iconic powerful bass resonance: 57mm ultra-large dynamic drivers,and Bluedio's iconic surging low-frequency shock let you feel deep bass resonance for superior sound quality.
Ultra-long operation and carefree calling from Bluetooth 4.1: With the robust high speed CPU of Bluetooth 4.1 operating system, the Bluedio Hurricane H boasts a long usage time of 40 hours of music, 45 hours talk time, and 1625 hours (approximately 67 days) standby time. Acoustic echo cancellation and noise reduction reduce ambient noise while speaking.
Customized function: Audio Sharing allows you to connect to another H headset via an audio cable, and share music with your friends (* it is recommended that headphones with impedance of 32Ω or higher be used). Simultaneously connect two Bluetooth devices, connect with your phone and tablet seamlessly, and  listen to music as you please!
Comfort: Custom fit supra-aural soft earmuffs and artificial protein leather of earmuffs simulated to human skin texture ensure long-lasting comfort.
Convenience: Just plug in with an audio cable (SOLD SEPARATELY),and listen to your favorite music tracks. The Hurricane H also has voice prompts in 4 languages (English, French, Spanish, and Chinese).
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: 16Ω
Frequency response: 20Hz-20kHz
Sensitivity: 110dB
Distortion:Music playtime: up to 40 hours
Talk time: up to 45 hours
Standby time: up to 1625 hours
Charging time: about 2 hours
Operational temperature: -10 to 50 degC

Package List:
1 x Headset
1 x USB Charging Cable
1 x 3.5MM Audio Cable
1 x User Manual