Feature: UHF 650-690MHz frequency band, phase-locked loop (PLL) frequency synthesis Effective distance control range 50-80 meters Adopt multi-level high-performance SAW filter with excellent anti-interference ability Produced with highly reliable SMD components, and leave the factory through an 8-hour aging test Ideal environment operating radius up to 80 meters, often used in various high-demand occasions Suitable for studios, stage performances, stadiums, schools, playgrounds, classrooms, etc. Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on Voltage: AC220V Color: Black Material: Plastic Specifications:Head Mounted Package Contents: 1 set of GLXD4 wireless microphones Only the above package content, other products are not included. Note: Light reflection 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.