Description: Portable & Convenient Operation: Small size and handheld, specially design for household use. 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. 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. APPLICATION Its advised to consult with a therapy professional about the laser therapy dosage and best laser by pointing directly to the point you are treating. Hold the laser an inch above the skin treatment method. For skin surface treatment, 7-15min. application is sufficient. For deep tissue and bone treatment, apply for 15-30min. Apply for 7-10 days then make 3-5 days break. Then repeat the treatment cycle for as long as you feel necessary. Laser therapy is effective for a range of applications such as:Pain relief Wound healingSports InjuriesBone repairRehabilitation therapyDermatologyNerve RegenerationLaser acupunctureVeterinary SPECIFICATIONS Battery Capacity: built-in lithium battery 2600 mAh Laser wavelength:808nm and 650nm Terminal laser output:2808nm laser beams and 12650nm laser beams Case Material:ABS Lens Material:Tempered glass Working model:continuous mode Time setting:start from 5 minutes, 5-30 minutes 6 grade adjustable Each grade increase 5 minutes Total outpower:550 mW Display:LED display Voice:without voice broadcast. There is bee sound when pressing the function buttons Weight:900g Size:17X15X14CM Package includes: 1 x main unit 1 x Original box 1 x power supply 1 x USB cable 1 x safety goggles 1 x manual