The Sennheiser e840 is a Dynamic Cardioid Vocal Microphone w/wide frequency response.
The Sennheiser e840 is a professional cardioid dynamic vocal microphone developed to cut through high on-stage levels. Rugged, with durable construction, it is insensitive to handling noise. The e840 efficiently suppresses sounds emanating from outside its pickup angle and is fitted with a hum compensating coil for reducing electromagnetic interference. Also available as e840 S with noiseless on/off switch.