Spec: 1) Emitter * Emission frequency: 85.5±0.5MHz or 84.5±0.5MHz; * Modulation mode: FM; * Emission distance: ≥ 8m; * Power supply:2 x AAA battery or 4.5V DC * Reception from any audio and visual equipment with audio out socket, such as TV set,audio device, DVD/VCD player, Multimedia PC, etc. 2) Receiver * Frequency range: 83-103MHz±1MHz * Reception Mode: FM * Distortion: ≥2 % * Power supply: 2 x AAA battery Packing: 1pc/color box; 20pcs/carton; Carton Size: 53.5*46*54.5 cm N.W./G.W.: 7.0 kg / 12.5 kg