Quantity: 14 stickers /box Shelf Life: Three Years Features: 1. Gentle formula for daily teeth cleaning and whitening, protecting tooth enamel. 2. Innovative purple whitening technology uses optical correction to neutralize yellow tones, instantly brightening teeth for a naturally brighter look. 3. No light or complicated operation required, comfortable fit, and 15-30 minutes of daily use easily integrates into daily care. 4. Combines whitening and color correction to remove surface stains and improve underlying discoloration for long-term oral beauty. 5. Gentle ingredients suitable for sensitive teeth, non-irritating, safe and effective for long-term use, promoting a confident smile. Storage: Store in a cool, dry place away from sunlight.