Safety, Precautions, and Contraindications - Face Mask

These recommendations are derived from consultation with medical experts and published research regarding precautions and contraindications as of the printing date.


  • Use the Time Keeper LED Therapy Face Mask only for the conditions specified in the indications for use. The device has been tested solely for these listed conditions, and risks for other conditions are unknown.
  • Avoid using the device after recent injury, surgery, or facial treatment, including neurotoxin, dermal filler, microneedling, laser, and chemical peel until the skin has fully healed.
  • Consult your doctor before use if you are, or suspect you are, pregnant.
  • Consult your doctor before use if you have, or suspect you have, cancer.
  • Do not treat red or swollen skin caused by a previous treatment. Wait until the redness and swelling have disappeared before treating again. If skin redness or swelling lasts for more than 2 hours, discontinue use and contact a healthcare professional.
  • Do not use the device and consult with your dermatologist before use if you have sensitive skin.
  • Do not use the device on open wounds.
  • Do not use the device on skin that is painful to touch, raised, crusting, or bleeding. This may be a sign of a more serious condition and should be checked by your doctor.
  • Do not use the device during a current Herpes Simplex Virus breakout.
  • Avoid using the device on broken skin.
  • Do not apply retinol before using RED LED light. Wait until after using the device.
  • If some individuals may experience redness, dryness, or irritation after using Blue LED light.
  • Your skin may become more sensitive to sunlight for two or three days- apply sunscreen. .
  • Do not overexpose the skin to Blue LED light therapy, as it may result in pigmentation or darkening.
  • Seek advice from a dermatologist or healthcare provider before using the blue LED light therapy device if you have a pre-existing skin condition or are undergoing dermatological treatments.
  • Do not look directly into the lights and ensure that no part of the device covers the eyes during use.
  • The device is designed for use on adults over 18 years of age and is not recommended for use in children under the age of 12.
  • No modification of this equipment is allowed.


    • Do NOT use if pregnant, planning pregnancy, or breastfeeding. Risks to the fetus, neonate, or pregnant woman are unknown.
    • DO NOT use if experiencing light-induced headaches.
    • DO NOT use if you have genetic eye conditions. Risks for such conditions are unknown; consult an ophthalmologist before use.
    • DO NOT use for Lupus erythematosus, photosensitive eczema, or albinism, as it may cause severe skin reactions.
    • DO NOT use if taking medication causing photosensitivity; consult a health-care provider if unsure.

    Other Substances Causing Photosensitivity:

    • St John’s Wort, Coal tar, Deodorants, Antibacterial soaps, Artificial sweeteners, Naphthalene (mothballs), Petroleum products, brightening agents in laundry detergent, Cadmium sulphide (found in tattoo ink)
    • Do not use the device to treat skin that is painful to touch, raised (higher than surrounding skin), crusting, or bleeding. This may be a sign of a more serious condition and should be checked by your doctor.


    Device Warnings:


    Before Use:

    Conduct a sensitization test before using the Time Keeper LED Therapy Face Mask.

    DO NOT use the device in any manner not precisely specified in these instructions; untested use poses unknown risks.

    Device Safety:

    • TURN OFF and REMOVE the device immediately if it feels hot or causes uncomfortably warm skin.
    • DO NOT use without removing creams, serums, lotions, and makeup BEFORE treatment. These products may cause light sensitization or diminish LED treatment effectiveness.
    • DO NOT use near water or in areas prone to spills. Avoid use if the device has come into contact with water. Keep away from hot surfaces.
    • DO NOT modify the device; such alterations void the warranty and may lead to electric shock upon reuse. The device has no serviceable parts.
    • DO NOT use if the device, battery, or charging plug are damaged.


    • Utilize the Time Keeper LED Face Mask as per the instructions provided in the User Manual.
    • Use only recommended accessories and replacement parts from Time Keeper LED Face Mask. Refrain from performing any maintenance not advised by Numiere.
    • The Time Keeper LED Face Mask and charger ARE NOT intended for use by young children or individuals with reduced physical, sensory, or reasoning capabilities.
    • Avoid using the Time Keeper LED Face Mask as a toy, and instruct children not to play with the device or charger.
    • CHARGING LOCATIONS: Charge the Time Keeper LED Face Mask with a USB-C charger indoors in a well-ventilated, dry location. Avoid charging outdoors, in a bathroom, or within 10 feet of water sources.
    • DO NOT use the device or charger in explosive atmospheres to prevent potential fire hazards.
    • DO NOT OVERCHARGE: Disconnect the device from the charger after one hour of full battery charge to avoid overcharging, which may reduce battery life over time.
    • Device Handling: DO NOT CRUSH, DROP, OR DAMAGE: Avoid using a charger that has been damaged or received a sharp blow. Do not subject the device or charger to crushing, dropping, or any form of damage.
    • BATTERY SAFETY: Prevent the internal battery from coming into contact with the skin, eyes, or mouth. In case of exposure to battery fluids, use protective gloves and seek medical attention for skin or eye contact.
    • DO NOT short circuit the battery, as it may cause fire and personal injury.
    • USAGE PRECAUTIONS: Discontinue use of the Time Keeper LED Face Mask if you experience severe pain. Stop treatment immediately if discomfort exceeds the expected sensations. Avoid using the device if it overheats or becomes uncomfortably hot.
    • OPERATING CONDITIONS: Avoid operating the device under blankets or pillows to prevent excessive heating and potential fire hazards.
    • BATTERY INSERTION: Insert the USB-C cable into the correct position on the device. Do not force the cable.
    • STORAGE GUIDELINES: Store the Time Keeper LED Face Mask, battery, and charging cable in a cool, dry place.
    • Charge the device only when the ambient temperature is between 0°C/32°F and 40°C/104°F.
    • DEVICE CARE: The Time Keeper LED Face Mask is not waterproof and should not be machine washed. Avoid placing the device where it can fall or be pulled into water sources. Clean the device following the provided instructions.
    • DO NOT disassemble the device, batteries, or charger, as it may pose risks of electric shock, fire, or exposure to battery chemicals. Disassembly or incorrect reassembly will void the warranty.