This microphone is both for use both as an amateur, professional use. Very useful for fun in the Party organizations, karaoke, meetings, conferences, meetings of information. Equipped with ON/OFF switch. Structured with its solid and durable aluminium alloy, this allows you to have a clear voice, without noise or interference.... Technical Specifications: Transducer: dinámico. Material: metal. Frequency Response: 50 Hz-15kHz. (1kHz) output impedance: 600? 30% Sensitivity: (or DB = 1 V/Pa at 1 kHz): -542db.