GRIFFIN GC10038 AirCurve Play Acoustic Amplifier for iPhone 4

Product Features:

• Acoustically amplifies the speaker of your iPhone without batteries, cables or electricity; internal engineered waveguide requires no power
• The perfect solution for audio and video conferencing with iPhone 4
• Listen to audio from videos, games, and music without headphones
• Holds your iPhone in both landscape and portrait mode
• Insert your own dock cable to use as a charge/sync dock