This is a compact electret condenser microphone with a gold-plated stereo mini-plug. It's lightweight and convenient to carry. I purchased it 20 years ago. Although I've never used it, as you can see in the photos, the back is missing. I'm willing to offer a discount if I ship it without the original box, so please comment if you're interested. Please purchase only if you understand the condition. - Model Name: ECM-DS70P - Brand: SONY - Type: Electret Condenser - Plug: Gold-plated stereo mini-plug - Dimensions: 58 x 57 x 16 mm