Saramonic's SmartRig II is an easy solution to connect any a XLR microphone or 6.3mm guitar to your iPhone, iPad and Android devices. As a high-quality microphone preamp, the SmartRig II allows you to use professional stage microphones or high-end studio microphones to create music with your mobile iOS or Android devices.
Important note: To use the headphone monitoring jack, the recording app you use must feature a "playback monitoring" option. What that does is sends a playback signal in addition to receiving the audio input.
Saramonic SmartRig II XLR Microphone & Guitar Smartphone Adapter
Frequency Response: 20Hz to 20kHz (+/- 1.5dB) Noise: -98 dB full band (with Phantom Power) Maximum Output Level: 2 Vrms Distortion: 0.025% THD Phantom Max Current: 13mA Dimensions & Weight: 8.8cm x 4.1cm x 4.2cm. 75g (2.57oz)