The BOYA BY-W4 2.4g 4-Channel Wireless Microphone System is perfect for those who require high-quality sound in live performance settings. It has a lapel microphone and automatic gain control function, making it ideal for use with a smartphone, iPhone, or DSLR camera. The small diaphragm size and transducer type add to its superior sound quality, and the bodypack transmitter allows for easy movement during performances. With a range of up to 50 meters, this wireless microphone system is suitable for various venues. It is available in black color and comes with four units.