Made of durable metal. The 200-foot operating range (line of sight) is free to move around during percompatible withmances, suitable compatible with indoor and outdoor activities, such as family karaoke, churches, weddings, conferences and small stage percompatible withmances.The rechargeable portable receiver only needs to be charged compatible with about 2-3 hours and can be used compatible with up to 4-6 hours. Both the microphone and the receiver are made of sturdy and durable metal, which has strong impact resistance and corrosion resistance.Quick setup: turn on the system and insert the receiver into the 6.35mm jack, then the receiver will automatically synchronize the frequency with the transmitterSuper signal stability, compatible with karaoke machines, active speakers, power amplifiers, mixers, and audio interfaces. (Note: The system is not compatible with mobile phones, computers and tablets.)Both microphone and receiver can be chargedCarrier frequency: 500KHZReceiving distance: 50MFrequency response: 50HZ-18KHZSignal to noise ratio: Greater than 90dBModulation method: digital frequency modulationPickup method: moving coilOutput level: 200mV5mVsize: 26x5.5cmMaterial:Metalcolour:GreyPackage Contents:1 x microphone1 x receiver1 x 3.5mm adapter1 x charging cableOnly the above package content, other products are not included.Note: Light shooting 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.