Spec: 1.Wireless Transmitting Distance : 30m 2.Transmission frequency 85.2?.2MH 3.Receiving Frequency Range : 84.5-106.5MHz 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: 54*39*42.5cm N.W./G.W.: 10/11.2kg