The Allen & Heath WZ4:USB Multi-Channel USB 2 Interface is designed to be installed into an Allen and Heath Mix Wizard 12:2, 16:2, or 14:4:2 mixer. The interface card mounts to the rear pod of the mixer and sends up to 16 channels of the converted audio data to the computer via the USB 2 connector (card should be installed by a qualified technician). The interface sends 16 channels to the computer and two return channels back to the mixer for stereo monitoring or effects. It can record at 44.1, 48, 88.2, and 96 kHz sampling rates at 24-bit resolution, and features two switches on either side of the USB 2 connector which control the routing options. For PCs, the card is compatible with 32- and 64-bit versions of Windows XP, Windows Vista, Windows 7, and Windows 8. For Mac, the card is compatible with OS X 10.5 Leopard, 10.6 Snow Leopard, 10.7 Lion, and 10.8 Mountain Lion. Allen & Heath is known for building high quality mixers for the last 40-plus years. At any time of day or night, across the globe, there is an Allen & Heath mixer out there working hard, sounding great and making life a little easier for the person at the controls.