Spec: 1.Frequency: 88-108 MHz 2.Effective with over 10 meters. 3.It can be compatible with multimedia appliances that have the audio frequency output plugs,such as TV,DVD,VCD,PC,PS; Main Function: 1.Wireless Listening Function; 2.FM Radio; 3.Wireless talking on internet; 4.Wired Stereo headset. Packing: 1pc/color box; 20pcs/carton; Carton Size: 61.3*47*48.3CM N.W./G.W.: 11.5/13 kg