Features: 
The microphone can be fixed on the DV with microphone hole and path. 
The MS stereo system enables a natural sound pick-up. 
Delivering a stereo sound image with superb clarity. 
The pickup pattern (affecting the soundstage width) can be set to 90 or 120 according to the sound. 
3.5mm MIC socket and 1/4" standard hot shoe. 
With a windscreen and a 3V CR2 battery. 
For Canon for Nikon for Pentax for Olympus for Panasonic Digital SLR Camera. 

Specifications: 
Frequency Response: 30-15000 Hz 
Sensitivity: -40 dB (0dB = 1 V/Pa at 1 KHZ) 
Type: MS (Mid - Side) stereo wire 
Length of cable: About 11.02 inch / 28cm  
Power Supply: 1* 3V CR2 battery (included) 
Battery life: About 800 hours 
Item Size: 13 * 6 * 2cm / 5.1 * 2.3 * 0.7in 
Item Weight: 47g / 1.6oz 
Package Size: 18 * 8.5 * 3.5cm / 7 * 3.3 * 1.3in 
Package Weight: 100g / 3.56oz 

Package List: 
1 * Microphone 
1 * Windscreen 
1 * 3V CR2 battery 

Note: 
If this microphone is connected with your D-SLR camera, the indicator LED will keep dark during recording. And if the indicator LED keep flash, it means the battery is too weak.