Features: 1. PC Controller:The master volume can be adjusted by rotating the top knob on the desktop volume controller, including the volume of any application currently in use. 2. Microphone Controller: You can hear your own voice through headphones. Press the button on the front of the controller to cycle through the four monitoring levels, Off, Low, Medium and High. 3. Suitable for Bose QC45 QC35 II gaming headset USB audio controller cable controller USB sound card. Specification: USB: USB2.0 fully compatible Operating voltage: DC: 5V±0.3V Operating Current: 20mA DAC decoding signal-to-noise ratio SNR: ~97dB DAC sampling rate: 96KHz/24bit Headphone drive capability: 16~150 ohms Hardware Equalizer: Bass and Treble Boost Device Jack: 3.5mm Support broadcast parameters: 8K/16K/22.05K/32K/44.1K/48K/88.2K/96K Support audio bit depth: 16/24bits Package Included: 1*Volume Controller Note: 1. Please allow 1-3mm error due to manual measurement. Please make sure you don't mind before ordering. 2. Please allow 1-3 grams weight error. Please make sure you don't mind before ordering. 3. Due to the different lighting of the photos and differences in monitors, the pictures may not reflect the actual color of the object. Please make sure you don't mind before ordering, thanks!