1: Appearance upgrade is more streamlined, stylish and more dynamic 2: Upgrade the sealing frequency conversion constant temperature function to stabilize the sealing temperature and stabilize the sealing effect 3: Low-shell waterproof upgrade to prevent water damage to the machine 4 The new design of the external drainage function is used to accidentally pump out water to protect the machine from occasional air leaks and avoid non-pumping. Size: 370 * 75 * 50 (mm) Sealing width: 280 mm