This microphone is easy to use: and receiver will automatically pair with each other after power on. With noise reduction technology, it can offer clear and realistic sounds, suitable for various occasions. Features: Professional Microphone: UHF wireless microphone with transfers audio signal fast and stably, with only 2.5ms delay, in a long 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 securing, shock resistance to eliminate sounds caused by unwanted vibration, and prevents scratches to instrument. Long Battery Life: built-in rechargeable 400mAh batteries make and receiver continuously work for 4 hours after they are fully charged( 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 mic. Specifications: Color: Black Microphone Type: Condenser Pickup Pattern: Cardioid Carrier Frequency: 500MHz-980MHz Modulation Mode: Digital Modulation Frequency Response: 30Hz-18KHz SNR: 96dB Distortion: <0.1% Delay: 2.5ms Frequency Points: 16 Power: 10mW Receiver Sensitivity: -96dB /Receiver Battery: 3.7V 400mAh Battery Working Time: About 4 Hours Charging Time: About 2 Hours Package Weight: 160g / 5.64oz Package Size: 24*22*4cm / 9.44*8.66*1.57in Note: Microphone set only, other accessories in the pictures are not included. All data is just for reference only, please refer to actual product. Due to manual measurement, there may be deviation, please in kind prevail. Due to or other reasons, the picture and material object may slightly differ. Packing List: 1 * Microphone 1 * Receiver 1 * Sponge Windshield 1 * Charging Cable 1 * Y-shaped Adapter 1 * 3.5mm to 6.35mm Converter