The iW1 is an AirPlay wireless audio system with a rechargeable battery. With Apple's AirPlay technology, you can play your music residing on your iOS device or iTunes wirelessly via a home Wi-Fi network to the iW1. It also supports charging and local audio playback via USB by using the USB sync cable that comes with new iPods and iPhones. For other music devices, you can use the 3.5mm stereo auxiliary input. iHome Connect is a free app on the App Store that allows you to do simple network setup and custom device naming.
The a-Jays Four comes with a flat, tangle-free cable that has a 3-button remote for your Apple iPhone. You can use the remote to play/pause music and videos, answer/hang up calls, control volume, and more. On the remote is a digital, active surface-mounted MEMS silicon microphone. The a-Jays Four comes with up to 5 pairs of silicone sleeves ranging in size from XXS to L. Specs-wise, the a-Jays Four uses an 8.6mm dynamic speaker driver and has an impedance of 16 ohms. The other end is an L-shaped silver-plated 3.5mm plug.