... format.Can be connected to the mobile phone, MP3, MP4, PC and other audio output devices.Material: metal. Output power: RMS ... : 150-18KHZ.SNR: ≥ 80dB.Speaker: 1.77 inch 4ohm.Power Input: DC 5V/1000mA.Built-in lithium battery.Product size: 5 ... : 26/25KGS.Accessories: USB cable, audio cable. Portable Mini speaker for cell phone,pc,mp3,etc