Main function: Bluetooth, Aux in, USB, TF, FM Product material: Plastic case + wooden box Bluetooth: 2.1+EDR/2.4G Speaker: 40mm 4Ω 3W Amplifier specifications: Stereo 3 W * 2 Battery: 3.7 V 800mAh Play time: 2-4hour Transmission distance: 10M Product size: 210 x 67 x 67mm Net weight: 360g Color: Blue, red, black