Highlight Features:Provides you with the best price, the best quality products and fast delivery to your hands.Excellent in look with a smooth line and surface.Supports Mp3(USB flash and for TF card), FM, LINE IN, Bluetooth stereo playing, Bluetooth Answer phone function.Song auto-memory function. It will play the last song of the latest time in the event that you don\'t charge the sound equipment.Rechargeable built-in battery with micro USB charging port which supports charging while playing.Complies with standard of Bluetooth 3.0, good interference-free performance, high data rate, high quality and efficiency.Advanced noise suppressing technology which assures industry accepted for best speech quality.The 4 foolproof function keys facilitate operation and utilization.Supports call waiting and teleconference.Long talk time and standby time with low power.Stable performance, quick connection, sensitive and accurate searching in the supported operation area.Easy to use in car, office etc.Detailed Specifications:Model: BBS4Product name: Bluetooth speakerColour: BlueBluetooth Version: V3.0+EDRCompatibility: V2.0/V1.1/V1.0Operating Range: 10 metersMicrophone: YesLoudspeaker output: 3WSignal to Noise Ratio(SNR): ≥84dbSensitivity: 80dB±2dBMusic Format: MP3Power Supply: Built-in BatteryInput: for DC 5V 500mAWorking voltage: 3.0-5.5VPlaying time: 4hCharging time: 1.5hSize: 145x50x50mm / 5.7x1.97x1.97inchProduct net weight: 200g / 7oz