ROCKBROS Multi-function Bicycle Phone Holder Bluetooth Audio MP3 Player Speaker 4400mAh Power Bank Bell Bicycle Light

Bluetooth V4.0 + speaker + power bank + bicycle light + bicycle bell + phone holder 

Waterproof, dustproof, anti-scratch, shockproof, high temperature resistant speaker 

Elegant and exquisite appearance convenient to carry, with it you can enjoy music anytime, anywhere 

Great for outdoor sport & exercise & travel 

Used as 4400mAh power bank, you can charge your phone or other device in emergency 

Dual LED lights with front light and turn signal to choose 

Bluetooth connection to mobile phone to call and play music 

Support TF card to play mp3 / wma / wav music 

Android or IOS software application for mobile phone 

Honking the horn like the bike go alarm to remind front vehicles or passerby

AUX input bracket 

IP54 waterproof 

32bit ARM master platform design and USB software upgrade

NOTE: Do not immerse in water! It only supports water mist-proof!