Smart Watch, Smart Glasses, Handheld Gimbal manufacturer / supplier in China, offering OEM ECG Hrv Smart Watch Band Temperature Breath Blood Oxygen Health Phone Call IP67 Waterproof Watch for Men Women, High Quality Accuracy Nordicra Circular Smart Ring with Activity Tracker ECG Heart Rate Temperature Monitor for Men and Women, Ows New Wireless Bluetooth Earphones with Touch Enc Noise Reduction Sports Earbuds LED Battery Indicator and Over Ear Hooks and so on.