Now this is one unique way of boosting the output of your iPhone 4 speakers. There have been apps for this before and here is a funky accessory now.
This little attachment works in the old fashioned way and channels the sound using a trumpet like output. Yes, That means no extra battery power sucked from your little handheld!
this silicone stand adds 12 decibels of sound pressure to your iPhone’s speakers without asking for an erg of battery juice.