| Cell phones |
| Electronic cigarettes |
| Headphones |
| Household appliances, such as |
|  Microwave ovens, major appliances, electric blankets, and heating pads are usually safe if they are working properly. |
| Metal detectors, such as those used for airport security. The risk of harm is low |
| Electrocautery used during surgery to stop blood vessels from bleeding |
| Magnetic resonance imaging (MRI) |
| Microwave diathermy for physical therapy |
| Radiation therapy to treat cancer |
| Shock-wave lithotripsy to treat kidney stones |
| Transcutaneous electrical nerve stimulation (TENS) to treat pain |