... for camping, sporting .. Etc outdoor using,Colordo as customers requirement.3.Impedance: 4 Ohm4.Frequency response: 275 HZ-20KHz5. Power output ... : 2W*2 6.Battery usage: DC 3.0 V/AA battery *47.Sensitivity: >= 85dB8.Accessory: 3.5mm jack plug, waistband, craftman hook ... *31cm Color: Black, silver, red, pink, grey, orange, blue, green... Bicycle speaker bag for mp3 sunglasses Mobile Phones