Fomito Aputure A. lav Professional Omnidirectional Lavalier Microphone Recording environments: Interview, Stage Performance, Self-Media Recording, Lecture... Included windscreen and windshield for high wind protection ensure quality recordings. Window-penetrating multi-functional indicator of A.lav keeps you informed of power status. An ideal solution for film, television, video, theatre, house of worship that demands a high quality microphone. Maximum SPL: up 100db; Frequency Range: 50-20KHz; Input Vol: DC3.7v .