Laser jammers are not legal in Texas. Section 547.616 of the Texas Transportation Code makes it a crime to use, install, buy, or sell a device designed to interfere with a radar or laser speed-measurement instrument used by law enforcement.1Texas Public Law. Texas Transportation Code 547.616 – Radar Interference Devices; Offense A violation is a Class C misdemeanor carrying a maximum fine of $500.
What the Texas Statute Actually Covers
Even though Section 547.616 is titled “Radar Interference Devices,” its definition sweeps in laser jammers. The statute reaches any equipment designed or intended to interfere with, scramble, disrupt, or cause a malfunction in a “radar or laser device” used by Texas law enforcement to measure vehicle speed.1Texas Public Law. Texas Transportation Code 547.616 – Radar Interference Devices; Offense What matters is the function of the hardware, not what the manufacturer calls it. Ham radios and similar electronics are explicitly excluded.
The prohibited conduct is broader than most drivers assume. Subsection (b) bans using, attempting to use, installing, operating, or attempting to operate a jammer in a vehicle you’re driving. “Attempt” is listed separately, so you don’t have to successfully defeat a LIDAR reading to break the law. Subsection (c) extends liability to the supply chain: buying, selling, or offering a jammer for sale is also illegal when the device is intended for use in a vehicle on Texas roads.1Texas Public Law. Texas Transportation Code 547.616 – Radar Interference Devices; Offense A retailer, a private seller on a classifieds site, and a shop that wires one into a customer’s car all face the same criminal exposure as the driver.
Penalties for a Conviction
A violation of Section 547.616 is a Class C misdemeanor.2State of Texas. Texas Transportation Code TRANSP 547.616 – Radar Interference Devices; Offense Under the Texas Penal Code, that classification caps the punishment at a $500 fine with no jail time.3State of Texas. Texas Penal Code 12.23 – Class C Misdemeanor Cases are heard in municipal courts or justice of the peace courts and move through the system like a traffic ticket.
Fine-only doesn’t mean consequence-free. A Class C misdemeanor is still a criminal offense, so a conviction leaves a criminal record. Commercial drivers face particular risk, since any criminal conviction stacked on a traffic stop can draw employer scrutiny. The jammer itself, often a several-hundred-dollar piece of hardware, can be seized during the stop as evidence.
Laser Jammers vs. Radar Detectors vs. Radar Jammers
This is where Texas drivers most often get the law wrong. A radar detector is passive. It listens for the radio frequencies emitted by police radar guns but transmits nothing back. Texas does not prohibit radar detectors in private passenger vehicles.
A laser jammer is active. When a LIDAR gun sends infrared light pulses at your car, the jammer fires its own pulses back to confuse the gun’s speed calculation. That active interference is what Section 547.616 forbids. The short version: listening is allowed, transmitting back is not.
Radar jammers sit in a third category and are illegal under both Texas and federal law. Under 47 U.S.C. § 333, willfully interfering with radio communications is a federal offense because the FCC regulates those frequencies.4Office of the Law Revision Counsel. 47 USC 333 – Willful or Malicious Interference Laser jammers use infrared light, not radio waves, so they fall outside FCC jurisdiction. That gap is exactly why Texas wrote its own statute.
Who Is Exempt
The statute carves out one exemption: law enforcement officers acting in an official capacity.1Texas Public Law. Texas Transportation Code 547.616 – Radar Interference Devices; Offense That lets police departments test, train with, and deploy specialized equipment without violating the law. Nobody else qualifies. There is no exemption for military personnel, security professionals, private investigators, or any other private citizen, whatever the profession or purpose.
Is There a Federal Ban?
No federal law bans the consumer use of laser jammers. The federal prohibition on radar jammers comes from the FCC’s authority over radio frequencies under 47 U.S.C. § 333.4Office of the Law Revision Counsel. 47 USC 333 – Willful or Malicious Interference Because laser jammers rely on infrared light rather than radio signals, they sit outside that authority. State statutes like Section 547.616 fill the gap. Several other states have enacted their own prohibitions; others remain silent on the issue. In Texas, the answer is clear: the device is illegal to use, install, buy, or sell.