Two-channel audio recorder Compatible with Zoom microphone capsules Supports up to 24-bit/96 kHz audio in BWF-compliant WAV or a variety of MP3 formats One-touch button controls 1.25” monochrome LCD display Rec Hold function to avoid accidental operation of buttons Stereo ⅛" Mic/Line In mini phone jack with Plug-in power (2.5V) Stereo ⅛" Phone/Line Output jack with dedicated volume control Built in limiter and auto level control to avoid clipping Pre-Record function Tone generator for calibrating audio levels between the F1 and a DSLR or video camera without the need for an attenuator cable Sound marker function that outputs quick tone to make syncing audio and video easy Records directly to micro SD and SDHC cards up to 32 GB ​Micro USB port for data exchange to and from computer and use as an audio interface with computer or iOS device ​Runs on only 2 standard AAA alkaline, Lithium, or NiMH rechargeable batteries, or AC adapter (AD-17) Up to 10 hours of operation with alkaline batteries (when using lavalier)