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