Manufacturer’s Description

Spy-worthy gadget for the modern audio connoisseur ushers in a new era of pure sound, sophistication and power. VAMP features a 150mW x 2 amplifier, dedicated pure Digital-Analog-Convertor, VQ audio enhancements, optical audio output and backup battery all integrated into a solid metal case that transforms an ordinary iPhone 4/4S into a sophisticated and stylish high fidelity device.

Manufacturer’s Website