Bluetooth Portable Speaker

We offers bluetooth portable speaker.
parameter
bluetooth version：v2.1+edr
bluetooth transmission power: class2 4dbm
bluetooth working frequency：2.4ghz
charging voltage: dc5v500ma
working voltage ：dc 3.7v
battery capacity:400ma
music playing time：4h
talking time:8h
thd: ≤ 0.1% (3.7v1khz1.8w)
signal to noise ratio：≥65 db
speaker parameter :4ω3w ф40mm
bluetooth range :10-20m
"colour :red ,blue,silver,
black,white,gun black
sell points
metal sense design
portable, hanging portable design
bluetooth wireless audio transmission
ariety of classic color for choice
with phone handsfree
computer small speakers
car bluetooth
"fm radio
"
card speakers
".