The Panasonic ErgoFit In Ear Earbuds Headphones RP HJE120 K are the perfect combination of style, comfort and most of all, high quality sound. With three included sets of earpads (S/M/L), you'll get a custom, comfortable fit that won't slip out, even while exercising. These black earbuds are a stylish choice, but you can choose from other vivid color options with color matching earbud pads and cord to best complement your style, mood or device. Large 9mm drivers with neodymium magnets along with a wide frequency response and smart ergonomic fit deliver dynamic, crystal clear sound while helping to keep out unwanted outside noise. The 3.6 feet cord threads comfortably through clothing and bags.Frequency Response (Hz-kHz) 20-20

Panasonic In-Ear Headphone Comparison Chart
Series RP-HJE120 Series
RP-HJE140 Series
RP-HJE355 Series
RP-HV21 Series
RP-HJE295 Series

Colors:
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Design
In-Ear Ergo Fit Design
In-Ear L-Shaped Design
In-Ear Design
Elastomer In-Ear Drops Design
In-Ear Ergo Fit Design

3 Pairs of Soft Earpads (S/M/L)

Drive Unit
9 mm
9.3 mm
10.7 mm
14.8 mm
10.7 mm

Impedance (ohm/1kHz)
16
16
16
16
16

Cord Length
3.6 ft.
3.9 ft.
3.9 ft.
3.6 ft.
2 ft. + 0.6m extension cord

Plug Nickel
Nickel
Gold
Nickel
Gold

Frequency Response (Hz-kHz)
20-20
6-25
6-24
10-25
6-24

Weight without cord
0.14 oz.
0.14 oz.
0.11 oz.
0.21 oz.
0.11 oz.

In-Cord Volume
No
No
No
No
No

Sensitivity (dB/mW)
96
107
105
104
104