Acoustically amplifies the speaker of your iphone without batteries, cables or electricity as the internal engineered waveguide requires no power. Aircurve is the perfect solution for audio and video conferencing with iphone 4. Your phone can be orientated both in landscape or portrait mode and can be used with your cable (not included) to charge your iphone. Compatible with iphone 4 only. Includes 1-piece white griffin logo gift box.