Alesis  HD24 (it has been converted to an HD24 XR ) 96 k Hard Drive Recorder comes with 2 caddies with 320 gig hard drives Remote Control Fan has been up gradedHD24XR is the world's first 96kHz, 24-track hard disk recorder designed to fit into any ADAT environment and match ADAT's legendary performance and affordability.HD24XR is built exclusively for the purpose of recording music instead of data, resulting in remarkable stability and performance. HD24XR enables engineers to record up to 24 tracks of high-resolution 24-bit recording at 44.1, 48 kHz, and 12 tracks at 88.2, and 96 kHz sample rates. HD24XR features the same A/D and D/A converters used in the acclaimed MasterLink.Two hot-swappable media bays provide convenient access to recording drives and allow data backup in minutes. You can edit tracks internally or easily transfer to computer via an Ethernet connection.HD24XR features ADAT Optical and ADAT Sync, enabling it to work efficiently with existing systems. It offers the same exceptional user-friendly interface ADAT users have come to expect.HR24XR packs 24 channels of digital audio I/O into a single-unit recorder that easily fits into any environment.