free TWO(2) more random colors of rubber bands, DIY your speaker as you like!Feature: Resonance technology of low frequence 360-degree omni-direction sound field 360-degree rotary volume control technology Speaker Specification: Item name: Mini speaker Lithium battery : 3.7V 500mAh Recharging voltage : 5V Horn specification : 40mm 2.6Ohm 3W Frequence response : 60Hz-18KHz SNR(Signal to Noise Ratio) :≥95dB Distortion degree : ≤0.5% Measurement: 60*60*53mm Packing list: 1 x Speaker 1 x Two-way Cable(one is USB for charging,the other is AUX cable) 1 x User Manual