Now you can measure 406, 121.5, and 243 MHZ in one tester. The Whiffletree BT-100AV triple ELT tester exceeds the measurement requirements for ELTs in the United States. Features include intuitive, easy to use software; receives all Cospas-Sarsat channels; powerful graphic, power, modulation, frequency; built-in antenna reception up to 15 meters; real time audio on 121.5 and 243 MHz; and produces complete test report. For more information visit www.whiffletreecorp.com or call (207) 647-3300.