Gutiar Amplifier MINI-9 1. 4" speaker,5watts 2. Multiple colors to choose 3. Customized amps 4. Certificates: CE, ROHS Gutiar Amplifier MINI-9 SPEAKER POWERFUNCTIONSPACKING 4" 5W Volume 20 pcs per carton Tone,, size of master carton Headphone Jack 490*175*276mm DC 9V Battery * Multiple colors to choose * Certificates: CE, ROHS Gutiar Amplifier MINI-9