{"data":{"id":"us/21-cfr-890.3725","jurisdiction":"us","citation":"21 CFR 890.3725","heading":"Powered environmental control system.","body":"(a) Identification. A powered environmental control system is an AC- or battery-powered device intended for medical purposes that is used by a patient to operate an environmental control function. Examples of environmental control functions include the following: to control room temperature, to answer a doorbell or telephone, or to sound an alarm for assistance.\n(b) Classification. Class II (special controls). The device is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to § 890.9.","path":["Title 21—Food and Drugs","CHAPTER I—FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES","SUBCHAPTER H—MEDICAL DEVICES","PART 890—PHYSICAL MEDICINE DEVICES","Subpart D—Physical Medicine Prosthetic Devices"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-21.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:47Z","sha256":"a5eecc7e6de2a53d657b64530f21ff830df9e79939ea1223d516565c17ba9a7c","source_id":"us-cfr","stale":true,"prev":"us/21-cfr-890.3710","next":"us/21-cfr-890.3750"},"notice":"GroundRules: Original legal text. Not legal advice."}