portable bluetooth speaker waterproof can use for outdoor sports

Description

unique outlook, design with our own patent.
waterproof, you can use outdoor for fun without worry.
Adopt multi layer intelligent structure to control sound quality.
Adopt high grade magnetic loudspeaker, make sure sound real & big.
Adopt high grade aluminum, make special coating, make it nice, long lasting.
Adopt high capacity battery power, after charging, you can enjoy long time happiness .