Description: LinkFlex AD1, a kind of preamp audio adapter with XLR-3.5mm interface, is capable of transferring audio signal from XLR interface and output sound after stepless gain adjustment through 3.5mm end. It can also accept to be monitored in moment, and universal for both smartphone and camera as well. XLR-3.5mm Audio Adapter Preamp Universal for Smartphone & Camera Stepless Gain Control Real-time Audio Monitoring. LED Working Indicator Notice: 1. The product supports all XLR dynamic and positive condenser mic, and not support passive condenser mic which need external phantom power. 2. The product is compatible with IOS and Andriod systems. When used with for and other version with for interface jack,the audio cable adapter (3.5mm - for interface) is needed. 3. While used for smartphone, please set smartphone to fly mode to avoid any interference. 4. While microphone is used for IOS system phones, it supports both for audio recording mode and video recording mode. 5. While microphone is used for Android System phones, it only supports phone's audio recording mode but not video mode, you should download 3rd party APP to use while in video mode. Specification: Output: 3 pin XLR interface Input: 3.5mm connector Gain Range: Maximum increase -10dB Frequency Range: 20Hz - 20kHz ±1dB Distortion + Noise: Less than 0.02%, RL=2kΩ, f=20-20KHz, Vo=0.7Vrms Battery: CR2032 3V Working Temperature: 0℃ - +50℃ Storage Temperature: -20℃ - +60℃ Color:Black Material:plastic Package Contents: 1 * Adapter 1 * Storage bag 1 * English instruction manual Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.