Product specifications: Chipset: RTL8763E Screen:1.57 inch Battery:180mAh Material:Zinc alloy + plastic Compatiable with: Android5.0 or iOS10.0 and above Functions: Exercise recording: counting steps more→, exercise time, exercise mileage, calorie consumption, sleep monitoring, uploading APP to save exercise sleep data. Health reminder: Heart rate measurement, blood pressure measurement, blood oxygen measurement(data can not compare with medical device, just for reference). Smart reminder: phone calls, message reminder and push. Sport Mode: walking / running / cycling / skipping rope / badminton / basketball / football / swimming. Language: Watch support: Simplified Chinese, Traditional