Made of durable metal. The 200-foot operating range (line of sight) is free to move around during performances, suitable for indoor and outdoor activities, such as family karaoke, churches, weddings, conferences and small stage performances. The rechargeable portable receiver only needs to be for about 2-3 hours and can be used for 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 transmitter Super signal stability, compatible with karaoke machines, active speakers, power amplifiers, mixers, and audio interfaces. The receiver can be rechargeable Frequency range: 200MHZ-700MHZ Carrier frequency: 500KHZ Receiving distance: 50M Frequency response: 50HZ-18KHZ Signal to noise ratio: 90db Modulation : digital frequency modulation Pickup : moving coil Output level: 200MV5MV size: 25x5cm Material:ABS+metal colour:Black Package Contents: 1 x microphone 1 x receiver 1 x 3.5mm adapter 1 x charging cable 2 x battery 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.