BT-1 Tour Earphone Bluetooth Sport Earhook Earbuds Stereo Over-Ear Wireless Neckband Headset Headphone with Mic for Universal Cellphones MP3

Color:black，red，white，blue.

Style:ear hook+neckband+sporting.

Cord length:70cm.

Packing: with pvc box.

HEADPHONES:

Bbluetooth transmission range:10 meters.

Speaker size:10mm.

Sensitivity:96±3db(at 1KHz 0.5Vrms).

Impedance:16Ω.

Frequency response:20~20，000Hz.

Plug type:3.5mm.

MICROPHONE:

Dimensions:4*1.5mm.

Sensitivity:-42dB+/-3dB.

Frequency response:30~16，000Hz.

Directivity:/omnidirectional.