- Vehicles or other motorized autos using a LoJack method or other anti-theft devices that will broadcast a radio frequency (RF) signal. The significant Strength fields produced by these units may possibly interfere with the operation with the Remote Control and its capability to control stimulation. Psychosocial Factors: Psychological anxiety, https://www.theorthopaedicandpainpractice.com/chronic-neck-and-shoulder-pain-relief-strategies-to-reduce-discomfort/