PULUZ Professional Interview Condenser Video Shotgun Microphone with 3.5mm Audio Cable for DSLR & DV Camcorder Features 1. The CR2, 3V lithium battery lead to long working time. 2. 2-range settings: Normal and tele. 3. Double back electret type capacitor microphone(stereo sound input). 4. Wild using rang: DSLR cameras, camera, DV recording, professional news receiver. 5. Portable 3.5mm Video audio output line. 6. Removable cassette, convenient for news interview microphone. Parameter 1. Type of Transduction: Capacitive. 2. Polar Pattern: Hypercardioid. 3. Acoustical Principle:linear Gradient. 4. SNR:70dB(1KHZ At1 Pa). 5. Max SPL: 120dB 1khz,1%THD Into 1K Load. 6. Geometric Noise: 20dB SPL. 7. Dynamic Range: 135dB_SPL; 8. Frequency Response: 30-15000HZ. 9. Sensitivity: -40dB+-20dB=1VPalkhz. 10. Power Supply: 3V. 11. Impedance: 200ohm. 12. Effective distance of pickup: 4m. 13. Validity of battery: 600 hours. 14. Size of microphone tube: 22*180mm. 15. Cord length and configuration: 0.5m. 16. A microphone weight: 120g. 17. Output: Unbalance. 18. Switch: Slide.