The Panasonic ET-TRM110 Built-in 3D Infrared Transmitter is available for greater installation flexibility. The PT-AE7000U already comes equipped with a built-in transmitter with a maximum transmission distance of 20′ (6 m). However, for additio…nal range up to 33′ (10 m), the ET-TRM110 is worth purchasing.Product Features:Panasonic ET-TRM110 Built-in 3D Infrared TransmitterDesigned for the PT-AE7000U HD Home Cinema ProjectorRange: 33′ (10 m)