47 C.F.R. § 18.301 Operating frequencies.
Title 47 - Telecommunication
ISM equipment may be operated on any frequency above 9 kHz except as indicated in §18.303. The following frequency bands, in accordance with §2.106 of the rules, are allocated for use by ISM equipment: Note: The use of the 6.78 MHz ±15 kHz frequency band is subject to the conditions of footnote 524 of the Table of Allocations. See §2.106.
Title 47: Telecommunication
PART 18—INDUSTRIAL, SCIENTIFIC, AND MEDICAL EQUIPMENT
Subpart C—Technical Standards
§ 18.301 Operating frequencies.
------------------------------------------------------------------------ ISM frequency Tolerance------------------------------------------------------------------------6.78 MHz.................................. ±15.0 kHz13.56 MHz................................. ±7.0 kHz27.12 MHz................................. ±163.0 kHz40.68 MHz................................. ±20.0 kHz915 MHz................................... ±13.0 MHz2,450 MHz................................. ±50.0 MHz5,800 MHz................................. ±75.0 MHz24,125 MHz................................ ±125.0 MHz61.25 GHz................................. ±250.0 MHz122.50 GHz................................ ±500.0 MHz245.00 GHz................................ ±1.0 GHz------------------------------------------------------------------------
