The THOR III is man-portable, counter-radio-controlled improvised explosive device (IED) jammer built by Sierra Nevada Corp, designed to counter specifically Radio Controlled Improvised Explosive Devices (RCIED).

[2] It was employed by the U.S. Army, U.S. Marine Corps, and partnered Afghan National Army soldiers in Afghanistan.

Sierra Nevada received the initial contract in December 2007.

[3] This system uses three transceivers mounted on backpacks to jam radio-controlled IEDs; each of the three different transceivers jams a different frequency bandwidth (Low, Mid, and High).

[4][5] Power requirements: Low-band, 2.5amps; Mid-band, 4.0amps; High-band, 5.0amps.