1. Automatic control , quick temperature rising ,high thermal efficiency ,long service life . 2. There are special thermal shield apparatus and overheating protection between internal heating element and crust . 3. No oxygen consumption ,no smoke , no taste , no moisture , low noise . 4. High convert ratio as high as 99.9% . 5. Low noise, smooth working ,easy to install and maintain . 6. Using artificial intelligence ,instrument , clear and eye-catching ,easy to operate .