Easy to Carry: Designed for personal home use, portable size and convenient to travel with. No pain or side effects. Can be used anytime anywhere and any circumstances.Easy to carry with into your pocket or pulse. Lifetime Warranty: If you have any questions, please don't hesitate to contact the seller. Safe & Non-Invasive: the apparatus adopts the principle of modern infrared light treatment, red light delivers non-thermal (non-heat) photons of light to the body. Pain Relief Therapy: powerful and safe medical grade LED light at the combination of the therapeutic wavelength of 650nm