Tascam DR-60DMKII 4-Channel Portable Audio Recorder for DSLR Four microphone inputs with 64dB of smooth gain and phantom power Select Four-track recording mode of Dual recording - a distortion-proof safety track Clear audio quality and A/D converters capture every whisper and shout of a performance Records up to 96Jz/24-bit WAV or BWAV audio to SD card media. Low cut filter and limiter to avoid noisy, distorted recordings OS- windows xp, windows vista, windows 7, windows 8, mac os x jaguar v10.2, mac os x panther v10.3, mac os x tiger v10.4, mac os x leopard v10.5, mac os x snow leopard v10.6.8, os x lion v10.7, os x mountain lion v10.8. Usb recommended is usb 2.0