Mini LED Speaker Music Audio TF USB FM Stereo Subwoofer with Mic

LED colorful lights flashing, Bluetooth, FM radio, speakerphone, AUX audio input, TF card. Bluetooth version: Bluetooth 2.1 Speaker: A used 40mm Power: 4Ω 3W Material: ABS shell. Adjustment method: Press. Operating voltage DC3.7V-4.2V Power supply: high quality A new double protection lithium battery (3.7V 400 mA) Play time: medium volume 2-3 hours or so Charge time: 2 hours Charging voltage: limit voltage DC5V Impulse current: DC500-1000MA Signal to noise ratio:> 80DB Distortion rate: <0.5% @ (1KHz) Frequency: 90Hz-20KHz Carton size: 33 * 33 * 32.5cm Package:1 x mini speaker