Sony Noise Reduction 150 feet Long Range Wireless Dynamic Stereo Headphones with Volume Control & Wide Comfortable Headband for All LG 42LV4400, 42LV5400, 42LV5500, 42LW, 47LD650, 47LE, 47LK, 47LV5400, 47LV5500 LCD HDTV Flat Screen Television Large 40mm Driver Units Deliver Rich, Deep Bass, low distortion and a wider dynamic range. PET Diaphragms ensure high rigidity for minimum distortion. Powerful Ferrite Magnets combine high energy and small size, for ample sound output. Wireless Radio Frequency allows high fidelity sound reproduction and has a large reception range of approximately 150ft. RF does not require line of sight and works even through walls.