Many toy R/C cars and wireless keyboards and mice operate on the 27 MHz R/C channels, especially 27.145 MHz. But most of these devices run far less than 4 watts and do not operate under the RCRS service. Instead, they operate under the FCC's Part 15 rules, which allow a wide variety of low powered devices to use the frequencies from 26.96 to 27.28 MHz, which covers CB Channels 1 through 27. Newer wireless keyboards and mice tend to use Bluetooth technology or frequencies in the 2.4 or 5.8 GHz region. Some R/C devices, especially quadcopters/drones, use cellular data techniques.