the iaru rules include detailed technical specifications for transmitter equipment. transmitters for two meters are typically 0.25 to 1 watts power output, and use keyed amplitude modulation. the transmitter antennas used on two meters must be horizontally polarized and omnidirectional. transmitters for eighty meters are typically one to five watts power output keyed cw modulation. the transmitter antennas used on eighty meters must be vertically polarized and omnidirectional. it is common for the transmitter, a battery, and any controlling hardware to be placed inside a weatherproof container such as an old ammunition case or large plastic food storage container for protection from the elements and wildlife.