... , mp3&laptop, can be solar powered via usb, high quality sound, volume control Portable speaker for cell phone, mp3, laptop etc. universal ... size and lightweight, maximum sound Volume controlTo be powered via USB, solar powered or Li-battery bank Great for camping outside ... .0mSpeaker: 57mmOverall size: D71xH36mmWeight: 200g Portable Cell Phone, MP3 & Laptop Speaker