Features:- Environmental silicone protective sleeve， resist compression， abrasion and reduce the harm from falling down， and you can change the color as you like.- Upgraded version Bluetooth， faster data transmission so that you can connect your Phone and Paid easily.- The small exquisite cylindrical figure， it is very comfortable to hold and convenient to enjoy your music anywhere， anytime.- Full， clear， high definition sound， don't let the size fool you， it will set out incredible sound.- Long playtime， quick recharge， you can enjoy hours of music via the in-built Lithium battery and recharge in just several hours using the included micro-USB cable.Brand: GACIRONModel: B07-BTDesign: Sport， Multifunctional， Cool， Portable， Fun， Stylish， MiniSupports: Remote Control， TF Card Music Playing， Loudspeaker， Bluetooth， Volume ControlFunctions: Songs Track， Stereo， AUX FunctionCompatible With: MP3， MP4， MP5， Mobile Phone， iPhoneConnection: WirelessInterface: 3.5mm Audio， USB2.0， Micro USB， TF Card SlotAudio Source: Electronic Products with 3.5mm Plug， Bluetooth Enabled Devices， Electronic Products with USB portMaterial: Plastic， SiliconeColor: Blue， Black， Green， RedBluetooth Version: V2.1+EDRAudio File Format: WAV， WMA， MP3Power Output: 2WStandby Time: 5-6hFreq: 150Hz-20KHzS/N: More than 85dBPower Source: USB， Battery， Wall ChargerWorking Voltage: 5VInput: DC 5VSpeaker Accommodation: ButtonBattery Capacity: 820mAhPackage weight: 0.195 kgProduct Size (L x W x H): 9 x 4.5 x 4.5 cm / 3.54 x 1.77 x 1.77 inchesPackage Size (L x W x H): 11.5 x 8 x 5.2 cm / 4.52 x 3.14 x 2.04 inchesPackage Contents: 1 x GACIRON B07-BT Mini Portable Bluetooth Bike Stereo Speaker， 1 x Audio Cable， 1 x USB Charging Cable， 1 x The Chinese and English Bilingual User Manual， 1 x Strap， 1 x Rope