This earphone will glowwithout any Batteryafter it absorbs the light.

So if it doesn't glow， please take it to the bright place for a few hours  or put it under the light for about 10 minutes，then you can see it glow when you take it in the dark place or at night.

1).Different colors in the daytime， but at night the light effect is the same， showing green luminous effect. If the luminous effect is not very good， recommend light irradiation， the luminous effect will be very good

2).In the first use，please put it near by light or under sun for some moment，then it will glow in the dark

Frequency: 20-20.000 Hz

Sensitivity: 106dB

Impedance: 16 Oh

Cable Length: 1.2m

Plug: 3.5mm

1x Zipper Earphone