Features: Professional Microphone: UHF wireless microphone with transmitter transfers audio signal fast and stably, with only 2.5ms delay, in a long range of 40 meters. Cardioid Pickup Pattern: cardioid condenser mic with noise-cancelling, accurately records voice from the front , effectively reduces noise from the side/back. Clarity Sounds: silicone clip provides safe securing, shock resistance to eliminate sounds caused by unwanted vibration, and prevents scratches to instrument. Long Battery Life: built-in rechargeable 400mAh batteries make transmitter and receiver continuously work for 4 hours after they are fully charged(charge time: 2 hours). Wide Application: the mic whose receiver can connect audio equipment by included adapters, is used as instruments mic(like trumpet, horn, etc.) or lapel lavalier mic.