Features： 1、Promote Healing: Red and infrared light is very effective for skin healing, and it can help you recover faster by reducing inflammation and reducing pain, and aid in blood circulation. 2、Intense Pulse Mode: Fever blister infrared light added an intense pulsed mode works by pulsed flashing to reduce tissue heating and get higher peak strength. 3、Removable Tip: Comes with a remove the tip, which is suitable for oral, nose and ear, also for larger areas on body including neck, hand, foot, knee, face, shoulder, wrist, finger or any part of the body. 4、Wavelength: Far infrared light with wavelength 460nm, 630nm, 660nm, 850nm and 900nm, which can reach deep injured tissues with the help of which can see a faster obvious result. 5、Rechargeable Dual Batteries: The wireless design offers portability and light weight. It comes with two 2200mAh rechargeable batteries and a charger, for travel. Specification： Item Type: Fever Blister Infrared Light Material: ABS Matching Battery: 2 x 18650 lithium batteries (built in) Single Battery Capacity: 2200mAH Wavelength: 460:630:660:850:900 Package List： 1 x Host 1 x Adaptor 1 x Tip 1 x Battery Charger 2 x Matching Battery 1 x Battery Storage Box 1 x Instruction Manual 1 x Lanyard 1 x Storage Bag