sE Electronics Reflexion Filter PRO Portable Vocal Booth Record vocals, guitars, and more with a 'drier' sound without an acoustically treated room The Reflexion Filter 3 5 is a portable device for recording live sound sources with reduced room ambiance It is an advanced composite wall which is positioned behind any microphone by means of a variable position stand clamp assembly which ships with the product The main function is to help obtain a 'dry' vocal or instrument recording