Stable triangle shape structure, exquisite and attactive metal gridA2DP stereo Bluetooth transmission3W strong output power with outstanding sound qualitySuitable for both indoor and outdoor exerciseAux in function support all digital audio device with 3.5mm jack, such as For iPod/iPhone, MP3, Computer, Notebook, PSP...500mA high capacity built-in rechargeable battery, playtime lasts for 5 hours at leastPassed the simulation environment test, you can use it in the rain without any probleBuilt-in microphone, support calls handsfree function.Support playing MP3 songs stored in the TF cardSupport external 3.5mm audio input terminals of all.Support FM automatic station search.Supports rechargeable.Design: Multifunctional,Portable ,LED colorfull lightCompatible with: MP3,TF Micro SD Card Supports: Bluetooth,Hands-free Calls,Loudspeaker,Microphone,Volume Control Functions: AUX Function,Noise Cancelling,Resonance,Songs Track,Stereo Connection: Wireless,Line inInterface: 3.5mm Audio,Micro USB,Microphone,Power Charge Port,TF Card Slot Audio Source: Bluetooth Enabled Devices,Electronic Products with 3.5mm Plug,Electronic Products with USB port,TF Micro SD Card Material: ABS Color: Black ,White ,Blue ,PinkBluetooth version: V4.0 TF Card Extension: 16G to the Max.(Not Included) Transmission Distance: W/O obstacles 10m Speaker Impedance: 4 ohm Power Output: 3W Freq: 50Hz-20kHz Power Source: Battery Charging Voltage: 5V Playing time: up to 5 hours Battery Capacity: 500mAhBattery Type: 18650 Lithium ion battery Product size (L x W x H): 66*66*66mm