Since the light is not on the skin, the information is switched off. It won't monitor your heart rate properly and it definitely won't track your sleep. I even found that the steps are a bit off. Don't waste your money even if it's cheap.
Polarized Bluetooth Audio Sunglasses - Flows: Open-Ear Speakers, Extended Battery Life, UVA & UVB Protection, Smart Glasses for Men & Women β Bruno Style (Matte Black)
6 Review
πΉοΈ HTC Vive Tracker 3 Pack (2018) for Virtual Reality Headset
3 Review
πΆοΈ Bose Frames: Black Audio Sunglasses with Bluetooth Connectivity and Open Ear Headphones
3 Review
πΆοΈ Bose Frames Tempo - Polarized Sports Audio Sunglasses with Bluetooth Connectivity in Black
7 Review