2 Set Electronic Accessories: 2 x Microphone Cartridge & 1 set x Digital to Analog Audio Converter Adapter A professional-grade vocal microphone cartridge with wide pitch, high sound, Clear mid-range, deep bass, natural sound quality and high sensitivity. Whether it is wired or wireless, it has a fidelity and vocal sound. Super current filtering noise, good shockproof effect, large dynamic range, precise directivity and less distortion. This Digital to Analog Audio Converter is designed for either home or professional audio switching. It converts Coaxial or Toslink digital audio signals to analog L/R audio. This Converter has many features that enable it to perform in a superior manner. Converts Coaxial or Toslink digital audio signals to analog L/R audio. Supports sampling rate at 32, 44.1, 48 and 96 KHz. 24-bit S/PDIF incoming bit stream on left and right channels. Provides electromagnetic-noise-free transmission. Easy to install and simple to operate. The Reason of cancel the external power adapter and use USB powered. Many devices (e.g. Computer TV DVD) USB ports output stable voltage and current, And filters some. Bad waves. So the DAC( Digital to Analog audio converter) will works better, And decode will more stable. In addition ,Use USB output power that is more environmentally friendly Product Name:Digital to Analog Audio Converter Adapter Product size: 6.5cmx4.1cmx2.5cm Colour:Black Material:ABS + metal Package Contents: 2 x Microphone Cartridge 1 x Digital to Analog Audio Converter Adapter 1 x USB Power Cable 1 x 0.5m fiber 1 x English manual