ECO TOWER Aluminum Blue Light Phone Tower, Solar and Wireless Ready. The wireless ECO TOWER, model ETP-MTE-WP, is designed for stand-alone remote area installations, where local power and/or communication lines are not available. Durable yet lightweight, this aluminum tower combines economy and ecology into one stylish product. An always-lit LED Blue Light mounted atop the tower provides high visibility and gives passers-by a sense of security. Patrons can call emergency personnel with a simple push of a button. At the same time, the LED Blue Light begins to flash. The Call Station faceplate is illuminated at all times for clear visibility during the night.