Tascam DR-70D, Portable 4-Channel Audio Recorder for Digital SLR Cameras (DSLR Camera), Up to 24 Bit / 96 kHz, Stereo or 4-track recording on SD / SDHC card, WAV and BWF recording format, Individually adjustable recording level for tracks 1-4, 4 Audio tracks mixable to stereo signal, Switchable impact sound filter, 2 Built-in microphones, 4 Combined XLR / jack microphone / line inputs with switchable 24 / 48 V phantom power, 3.5mm Mini Jack Stereo Camera In and Out / Line Out Jack, Headphone output: 3.5 mm jack stereo, USB 2.0, Micro-jack socket 2.5 mm for optional remote control, Power supply: 4 x AA batteries, USB or AC adapter (Tascam PS-P520E - not included), Power source automatically switches from external to internal if required (with display message), Dimensions: 169 x 55 x 107 mm, Weight: 530 g