Bikonnect All(10)-In-1 Bike Speaker - Phone Mount Bluetooth Phone Answering Audio MP3 Player Phone Charger Bicycle LED Light Micro SD Card /USB Slot Aux Input Waterproof "BEST SELLING BIKE GADGET IN EUROPE AND ASIA" FEATURES: The iGad Bikonnect is an all in one Convenient Amazing Bicycle Speaker. Stretchable phone holder fits most phones (up to 3.7 in.), MP3 Player Supports MP3/WMA/WAV and all audio formats, Phone Answering, Bluetooth, Phone Charging Power Bank, 2 strong LED Bike lights, Micro SD/USB Slot, Aux Input. All-In-One Multifunctional DeviceBIKE SPEAKERS: 2 round shaped powerful sound speakers with control function make your bike as music hub! LONG BATTERY LIFE: Built-in 4400mah battery, with a battery life of up to 30 hours, mini usb charging interface (charging cable included) RECOMMENDED BY HEALTH EXPERTS INSTEAD OF USING HEADPHONES: Listen to hours of music and answering phone calls while enjoying your bike ride without risking your health and harming your ears EASY INSTALLATION: Very easy to install, no tools required.