MP3 Bluetooth Blue Spectrum V-20 Headphone

Blue Spectrum Stereo wireless headset with microphone Bluetooth connection 5.0 Battery 

capacity: 200mAh 

Transmission distance: up to 10 m 

Speaker size: 40 mm 

Frequency response: 20Hz-20kHz 

Obstacle: 64ohms Microphone 

sensitivity (115kHL) +/- 3dB 

Music duration: 4-6 hours 

Introduction 3.5 mm Aux