darkest, and/or least sensitive skin. Start with lower numbers 1-4. As you become familiar with your own sensitivity, adjust the number accordingly. Hint: If you experience reddening of the skin after all 11 LED's have lit up, set your SunFriend® Skin Sensitivity to a lower number the next time you use it.
Wear SunFriend face-up on your wrist throughout the day. Make sure the face is unobscured by clothing. Push the Check UVA+B button from time to time to see how your sun exposure is accumulating. When all eleven of your LEDs light up and are Flashing, you have had your UV/Sun exposure for the day.
When flashing, turn OFF. It is time to apply sunscreen and/or sun-block clothing, or to go indoors. Turning SunFriend off also resets it for a new daily exposure. Hold the on/off button for at least 2 seconds, until the lights power down.
See the SunFriend® instructional video for additional information.
Setting your sensitivity level is a personal experience. Factors that affect you may include skin color, diet, activity type, medications, and regularity of sun exposure. If you set the number too high, you may see reddening of the skin. If this occurs, set your SunFriend Sensitivity to a lower number. When you are trying to get a safer, healthier amount of sun, you do not want the skin to redden. SunFriends are also not intended for use in tanning beds.
Instructions for checking the UV Index so you know how strong the sun is.
Align center of SunFriend directly with the sun for at least 10 seconds
Press UVI button and wait for the light to indicate the UVI
Please note: The sensor takes a reading from your environment every few seconds, and also reads reflective UV. Pointing it directly at the sun for less than 8 seconds may not give you an accurate initial UVI reading, but that does not mean your SunFriend is not fully sensing all of the environmental UV you are being exposed to. Customized algorithms allow for varying movement, reflective UV, and actual weather conditions to provide you with an overall safer amount of UV exposure regardless of the UV Index reading you get from your SunFriend©.
The UV Index is an international standard measurement of how strong the ultraviolet (UV) radiation from the sun is getting through the ozone and atmospheric conditions such as clouds and smog.