const updateHeaderMetrics = () => { const header = document.getElementById('header'); const rect = header.getBoundingClientRect(); const headerHeight = rect.bottom; document.documentElement.style.setProperty('--header-height', `${headerHeight}px`); }; window.addEventListener('DOMContentLoaded', updateHeaderMetrics); window.addEventListener('resize', updateHeaderMetrics); const header = document.getElementById('header'); const resizeObserver = new ResizeObserver(entries => { for (let entry of entries) { const rect = entry.target.getBoundingClientRect(); const headerHeight = rect.bottom; document.documentElement.style.setProperty('--header-height', `${headerHeight}px`); } }); resizeObserver.observe(header);

Genuine Dr. Pen

Look for the Dr. Pen Genuine Verification Seal

1. Go to Dr.pen anti-counterfeit verification website

2. Scratch to see the entire QR and Security Code

3. Two verification options: Scan the QR code or verify the security code via the website

Note: Each authentication number is valid for once. If it has been verified before, verification time will be shown for your reference.

Dr. Pen Official Retailer