Radio frequency radiation is usually measured in kilohertz (kHz), megahertz (MHz), or gigahertz (GHz). These have modern equivalents such as kilohertz (kHz), megahertz (MHz), and gigahertz (GHz). JTRS was originally planned to use frequencies from 2 megahertz to 2 gigahertz. The chipset converts the signals from 2.3 gigahertz (GHz) to a lower intermediate frequency. It runs a 2.5 gigahertz Snapdragon 801 chipset with 3 gigabytes of RAM. The frequencies in use range from about 10 gigahertz to a few hundred GHz. Modulation bandwidths extending into the gigahertz range are possible with the use of laser-controlled modulators. At very high (gigahertz) frequencies, signal processing circuitry performs poorly. Point-to-multipoint telecommunications is typically used in wireless Internet and IP telephony via gigahertz radio frequencies. Frequencies up to several gigahertz are used in acoustic microscopes. Tau Ceti and Epsilon Eridani near the 1.420 gigahertz marker frequency. They work on frequencies between three and ten gigahertz. CNT devices are projected to operate in the frequency range of hundreds of gigahertz. It transmits its signals at 2.4 gigahertz. MEMS resonators have operated at over a gigahertz.