Package included: 1 x Host 1 x Carrying Case 1 x Power Adaptor 1 x USB cable 1 x Manual 1 x Warranty card The product is warrantied for one year from date of purchase and lifetime after-sale service support( If any quality issue within one year, we can replace new one free of charge)Long Duration Time: A rechargeable 2600mAh lithium battery inside, when fully charged for 2 hours, its duration time reach 4 days. Turn On: Long press the ON OFF button (hold for 3 seconds) to turn on the device and click again to start. This device has a perfect combination of 12x 650nm diodes and 2x 808nm diodes. Please note there is a layer of film on the display screen in order to protect the display screen. More detail information please see the product manual which in the package box. The device is warrantied for one year from date of purchase and lifetime after -sale service support( If you have further questions, please leave message to us. We will do our best to provide excellent customer service to you.). ?THE FOUR CENTRAL 808NM DIODES ARE INVISIBLE. Just use your iphone or any phone's camera to take a picture and look through this picture and you should see it, the naked eye is difficult to observe clearly. So you probably don't think it's activated yet, actually it's already working. Portable Convenient Operation: Small size and handheld, specially designed for household use.