The frequency range from 2.4 to 2.4835 GHz, which is unlicensed and used for many communications applications, including Bluetooth and Wi-Fi. Microwave ovens also use this frequency but at significantly greater wattage. For example, whereas a cellphone might emit one watt into the atmosphere, a microwave oven cooks food internally at 700 watts and more. See
5 GHz band,
ISM band,
Bluetooth and
802.11.