A1 Low power transmitters operating on frequencies below 1 GHz (with the exception of spread spectrum devices), emergency alert systems, unintentional radiators (e.g., personal computers and associated peripherals and TV Interface Devices), and consumer ISM devices subject to certification (e.g., microwave ovens, RF lighting, and other consumer ISM devices)
A2 Low power transmitters operating on frequencies above 1 GHz, with the exception of spread spectrum devices
A3 Unlicensed Personal Communications Service (PCS) Devices
A4 Unlicensed National Information Infrastructure (U-NII) devices and low power transmitters using spread spectrum techniques