K-Array Ecodock Single Freestanding Loudspeaker Horn for iPhone 4 and 4s

Ecodock Eco-amplifier for iPhone4 and 4s. Wireless, no batteries or power supply needed. Ecodock uses natural laws of physics to amplify your iPhone4 or 4s.
Features:

• 10db extra for voice calls and music
• Clearer sound; Listen to music with your friends
• Increase your volume without increasing power use
• Save battery life