WS-VS is a 2-channel audio adapter for shooting videos with any DSLR cameras or camcorders. Sometimes, the sound picked by microphone directly might not satisfy our recording needs. And this audio adapter can help us to control the audio effect or turn left/right single channel audio into 2-channel stereo. Features: Two-channel audio adapter for most DSLR cameras and camcorders, it helps to record better sound effect. Three integrated mounting shoe bases allow you to attach various microphones, wireless receivers, or others accessories, such as LED light, monitor etc. It has two mono 1/8"(3.5mm) mini-jack input, one stereo 1/8"(3.5mm) mini-jack input and one stereo 1/8"(3.5mm) mini-jack output. Dual trim control knobs for controlling sound volume. Do not require battery for power supply. Built-in hot shoe adapter for you to mount it on camera easily. Specifications: : Model: WS-VS Gain: Unity Input Level: -35dBu minimum Frequency Response: 20Hz to 20KHz (+/-0.5dB) Input: -One stereo 1/8"(3.5mm) mini-jack input -Two mono 1/8"(3.5mm) mini-jack input Output: -One stereo 1/8"(3.5mm) mini-jack output Item Size: 7 * 4 * 4cm / 2.7 * 1.6 * 1.6inch Item Weight: 65g / 2.3oz Package Size: 8.5 * 8.5 * 6.8cm / 3.3 * 3.3 * 2.7inch Package Weight: 114g / 4oz Package List: 1 * Audio Adapter Note: This audio adapter doesn't work with microphones that are not powered by battery.