The PodTrak P4 has everything you need to capture or stream professional-quality podcasts to an SD card, your computer, your Android or iOS device. It is equipped with professional Zoom preamps (up to 70dB of gain), four independent headphone outputs with dedicated volume control, four customizable Sound Pads ... Are you not physically with your guests Just connect your phone (using the TRRS cable), or to your computer via USB. Thanks to the mix-minus function integrated into the P4, echo and feedback will be automatically eliminated. You can also use the Zoom BTA-2 Bluetooth receiver (optional) to connect your wireless phone to register your guests remotely. The P4 operates for up to 4 hours on 2 AA batteries. You can also use a USB battery for extra battery life! Features: - 4x microphone inputs with XLR connectors with phantom power, gain control and mute switch - 4x headphone outputs with individual volume control - TRRS smartphone connection on 1x 3.5mm jack - Mix-Minus function automatically preventing feedback of audio calls - 4x assignable Sound Pads with 11 preset sounds - Recording of separate tracks directly to SD, SDHC or SDXC card up to 512 GB - Sampling frequency: 16-bit / 44. 1kHz in WAV - 1x USB-C connector, class compliant mode for iOS compatibility (Apple Lightning to USB camera adapter required) USB audio interface with 2 inputs and 2 outputs - Works with two AA batteries (up to four hours), optional Zoom AD-17 or USB power supply - Comes with 4x AA batteries - Dimensions: 112 x 155 x 47 mm - Weight: 290 g (without battery)