Audio Technica AT9913iS Compact Plug-in Microphone for Smartphone:

High quality small mono microphone for digital recorder. Plug-in power method not requiring of battery. Newly developed pivot floating structure to decrease external vibration noise of equipment. Line directional pickup and free angle mechanism in the aimed direction that can freely adjust the angle. Metal body that decreases stylish and extrinsic noise in solidity. Smartphone and iPhone compatible.

Features:

• Line gradient shot-gun Microphone is convenient for recording speech, meeting record, school lecture and etc by user's smartphone
• No separate battery power is needed. The power is supplied by plug-in power from user's smartphone
• There is a Ø3.5 mm stereo mini jack for connecting to earphones or headphones, so user can monitor the sound immediately after recording
• The pivot-floating-structure can reduce the unnecessary vibration or the ambient noise when recording
• The free-angle-mechanism can adjust the angle-tune, easily, smoothly, and freely
• The windscreen allows user to use the microphone outside and minimize the noise
• The plug-in power method is supplied the power supply from the microphone input of the connected equipment to the microphone and operates

Specifications:

• Element: Mono Electret Condenser
• Polar Pattern: Line directional
• Frequency Response: 70~15,000 Hz
• Sensitivity: -34 dB (20 mV) re 1V at 1 Pa
• Impedance: 1,400 Ω
• Power Supply: Plug in Power
• Dimensions: Ø10.8 mm x 165 mm; Ø22 mm (Outside)
• Weight: 15g
• Headphone Output: Ø3.5 mm stereo headphone mini-jack
• Accessories Furnished: Windscreen, Stopper