Electrical Hazard
Take care when plugging your Sony PSP into its included wall adapter. Replace the wall adapter immediately if it shows signs of wear, damage or tearing. A damaged wall adapter is a serious fire and electrical hazard and should never be used. Use only the wall adapter included with your PSP console or an adapter approved for use by Sony.
Photosensitivity
The Sony PSP hosts a built-in display that may induce nausea, cause motion sickness or trigger epileptic seizures in certain individuals. Sony warns that if you feel dizzy or suffer from eye or muscle twitches and altered vision, stop playing and talk to your doctor immediately. If you suffer from nausea and motion sickness while playing, stop playing until you feel better. If these symptoms persist, speak with your doctor before using your PSP again. Decrease the changes of motion sickness or a seizure by playing in a well-lit area with the screen at a comfortable distance away from your face, taking at least a 15-minute break for each hour of play time and playing only when well-rested.
Radio Waves
Radio waves produced by the Sony PSP may interfere with life-sustaining medical equipment. Sony recommends consulting your doctor before using a PSP if you have a pacemaker or depend on another electronic medical device. Sony also suggests keeping the console a distance of nine inches or more from a pacemaker or any other electronic medical device.