Wired headphone neckband

Specification:

Neckband Headphone with black foam ear cover

Model No.: DT-896

Plug: 3.5mm wired single pin, (double/ triple pins option)

Headphone color: regular is black, other is optional for exact QTY.
Impedance: 32 ohms
Speaker: φ30mm 
Sensitivity: 100 ±3dB /mW at 1KHz
Frequency Range: 20 - 20,000Hz
Channel Balance: < 3dB
Distortion Rate: < 1%
Cable Length: 1.2m ± 10%(round cable)

Cable material: PVC or nylon for option

Packing: Each earphone packed into sealed small plastic bag

10pcs per big plastic bag, 100pcs per carton.