Metal speaker/Heavy/Nice sound

Function: Speaker/Handfree/FM radio/TF Card

Material: Metal+ABS

Logo: Laser engrave on speaker top net/silk screen on metal body

Packing: Blue gift box with window/White gift box optionnal

Bluetooth version：V2.1+EDR

Bluetooth transmission power:   CLASS2  4dBm

Bluetooth working frequency：2.4GHz

Charging voltage:    DC5V/500mA

Working voltage ：DC 3.7V

Battery capacity:400MA

Music playing time：4H

Talking time:8H

THD: ≤ 0.1% (3.7V/1KHz/1.8W)

Signal to Noise Ratio：≥65 db

Speaker parameter: 4Ω3W ф40MM

Bluetooth range :10-20m

Colour : Red/Blue/Silver/Black/White/Gun metal