Product Review

Performance parameters:
Frequency response: 30-15000 Hz
Sensitivity: -40 dB (0dB = 1 V/Pa at 1 KHZ)
Pointing to the features: single directional x 2
Output impedance: 200ω (Ohm)
Signal-to-noise radio: 76 dB (1 KHZ at 1 PA)
The loudest level: 120 dB at 1 KHZ harmonic distortion in 1% or less)
Power supply: 3V DC

Specifications:
Type: MS (Mid - Side) stereo wire
Length of cable: About 11.02 inch / 28cm
Power requirements: 3V CR2 battery
Battery life: About 800 hours (at room temperature, the use of packing attached 3V CR2 lithium battery)
Size: 5.12 x 2.36 x 1.38 inch / 13 x 6 x 3.5cm (L x W x H) (not including conductor)
Package size: 8.07 x 4.92 x 1.57 inch / 20.5 x 12.5 x 4cm (L x W x H)
Color: Black
Net Weight: About 45g (not including battery)
Gross Weight: 4.2 oz / 119 g
Size: 30.5 * 61 * 132.5mm
Accessories: 3V CR2 lithium battery x 1;
operating instructions x 1

Pay attention:
If this microphone is not connected with your D-SLR camera, after you put the battery inside and push the button, the indicator LED will flash for a second only.
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 and you need to change a new battery.
While using, please kindly purchase extra batteries as spare ones because the attached battery isn't rechargeable, and the capacity may not full, and it's for test purpose only.