Movo Executive Lavalier Clip-on Interview Microphone with Secondary Mic & Headphone Monitoring Input for Apple iPhone, iPad, Samsung, Android Smartphones/Tablets Executive Lavalier Features: Primary Lavalier Mic with 8' (2.5m) Cable, Secondary Removable "Interviewee" Lavalier Mic with 4.9' (1.5m) Cable, 3.5mm Headphone Monitoring Jack (Requires App with Headphone Monitoring Support) 3.5mm TRRS 4-Pole Connector Jack for Apple iPhone, iPad, iPod Touch, Android Smartphones and Tablets Includes Deluxe Case, 4 Foam Windscreens & 4 Lapel Clips No battery required 1 Year Warranty Transducer: Electret condenser Polar Pattern: Omnidirectional Frequency Response: 35 Hz to 18 kHz Sensitivity: -30 dB +/- 3 dB (0 dB = 1 V/Pa @ 1 kHz) Impedance: 1 k +/-30% @ 1 kHz Signal/Noise Ratio: 74dB SPL Cable Length: Main Mic 8&#039; (2.5m), Secondary Mic 4.9&#039; (1.5m)