powerful De-Ageing Booster With Pure, Fresh, Highly Concentrated Vitamin C 10%. Brightens, Evens And Repairs Skin For A Younger Look. It Contains 4 Boosters.specially Designed Packaging Isolates Pure, Fresh Vitamin C In A Sealed Chamber For Maximum Effectiveness. You Activate It Fresh—And It Delivers. Simply Push The Button To Release Pure Vitamin C 10% Into The De-Ageing Soothing Emulsion. Smooth It Over Your Face Morning And Night, Alone Or With Your Moisturiser, For Results You Can See. Once Activated, Each Vial Is At Full Potency For 7 Days, But Can Be Used Up To 14 Days. Then Discard.directionsto Activate:1. Leave Cap On. Remove Foil.2. Firmly Press Inner Bulb 2X To Release Vitamin C Into The De-Ageing Soothing Emulsion.3. Shake 15 Seconds.to Use:1. Shake Before Use. Remove Cap.2. Press Bulb 2-3X To Dispense Into Palm Of Hand.3. Smooth All Over Face Alone Or With Your Moisturiser.4. After Activation, Booster Is At Full Potency For 7 Days, But Can Be Used Up To 14 Days. Then Discard.