Features: 1. battery powered
                  2. battery is rechargeable, and can use 50 minutes continually after full charged
                  3. 2pcs covers, portable for indoor and outdoor using
                  4. 2pcs extra clean device and 1pc mouthtip are available
                  5. four colors: white, blue, light blue, orange
                  6. the best vaporize temperature is 190C
                  7. high quality and competitive price