Smart Watch, Doosl Bluetooth Smartwatch for Men Women Fitness Tracker Watch with Heart Rate Blood Oxygen and Sleep Monitor Waterproof 1.69-inch HD Touchscreen for iPhone Android Amplifier Devices for Seniors long press to turn green

long press to turn green - select 4 levels of brightness Double key pressed at the same time: press to turn blue at the same time - learn the environmental noise spectrum

step 4:Install the device

if you have any questions about our dentist tool kit

Working Time: ≥10 Days

Smartphone

Smart Watch, Doosl Bluetooth Smartwatch for Men Women Fitness Tracker Watch with Heart Rate Blood Oxygen and Sleep Monitor Waterproof 1.69-inch HD Touchscreen for iPhone Android Amplifier Devices for Seniors long press to turn greenThis Bluetooth Smartwatch for men and women can get a call reminder and App notifications, control music conveniently after connecting the smartwatch to your phone. Doosl Smart watch for Android Phones Samsung iPhone and has Accurately record all day activities like steps, distance, calories burned, miles walked, active minutes. Doosl Smart watch Heart Rate Monitor, Sleep Tracker AND IS A Waterproof Fitness Watch, THE Doosl Smartwatch is the best