Product Description The Saramonic SRTM1 is a directional shotgun-style microphone featuring a cardioid polar pattern. It has a built-in rechargeable battery, 150 Hz low cut switch, + 6 dB high frequency boost, -10 dB pad, and power button. The SRTM1 is ideal for DSLR video production, film production, field recording, sound design and broadcast applications. Technical information Acoustic principal: Line gradient Directional pattern: Cardioid Frequency range: 40-20k Zz (selectable HPF 150 Hz) Sensitivity: -35 +/- 3dB (OdB = 1V/Pa @ 1 KHz) 1.5V 2.2Ko Sound impedance: 200 Ohm Maximum output: 10 dBu (at 1 KHz 1% THD into 1 KOhm) Dynamic range: 119 dB (per 1EC651) Maximum SPL: 135 dB Signal to noise ratio: 75 dB SPL (per 1EC651) Power: 48V phantom power; built-in lithium battery (battery life: 150 hours) Output connection: 3-pin XLR, balanced output between Pin 2 (+) Pin 3 (-) and Pin 1 (ground) Dimensions: 2.3 x 2.3 x28.2cm Weight: 171g Set Contains: SR-TM1 Microphone;Micro USB Cable;Mic Clip;Foam Windshield