article_snippet: The water-resistant device additionally lasts for two days on standby.
article_snippet: Sunfriend's UVA=B wristband is said to negate the need for suncream by monitoring the wearer's exposure to UV rays.
article_snippet: Sensors monitor UV levels and LEDs light up gradually.
article_snippet: Sunfriend's UVA=B wristband is said to negate the need for suncream by monitoring the wearer's exposure to UV rays.
article_snippet: Sensors inside the waterproof wristband then monitor UV levels and LEDs light up as UV exposure accumulates.