Fully compatible: The wireless receiver with a universal 1/4 inch plug can be used with mixers, PA speakers, karaoke machines with 1/4 MIC IN for voice amplification, telephones and laptops for recording. Clear sound quality: The wireless lavalier microphone system provides high-quality sound transmission and clear voice within a line of sight of up to 160 (50 meters) feet. Easy to set up: plug and play, powered by a rechargeable battery, choose a lapel or headset microphone and plug it into the microphone socket of the transmitter, turn on both, and you can start. It is not easy to be interfered by electrical appliances, and the signal transmission is stable, allowing multiple units to work together without interference. Multi-purpose application: very suitable for live performances, such as church sermons, weddings, speeches, school plays, training, public speeches, interviews or video and audio recording Microphone type: U-segment wireless microphone Frequency modulation : adjustable frequency (automatic frequency matching) Frequency response: 30Hz-18KHz Signal to noise ratio: 96dB Distortion: Less than 0.1% Frequency points: 48 Dynamic range: 96dB delay 2.5ms Transmitter power: 10mW Receiver sensitivity: -96dB Receiver usage time: 3-4 hours Charging adapter: 5V Receiving distance: about 50 meters Colour:black Material:ABS Size:6 x 9 x 18cm Package Contents: 1 * receiver 1 * launcher 1 * Charging Cable Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.