GENERAL Brand Amazfit Model Name GTS 4 Mini DESIGN AND BODY Weight 31g Material Aluminum Alloy + Plastic , Silicone Shape Rectangle DISPLAY Type Color AMOLED Touch Yes Size 1.65in Resolution 336x384pixels PPI 309ppi CONNECTIVITY Bluetooth Yes, 5.2 GPS Yes CAMERA Camera No Features Camera control TECHNICAL Compatible OS Android 5.0 or iOS 10.0 and above MULTIMEDIA Music Music control BATTERY Battery Capacity 270mAh Battery Backup 15days StandBy Time 1.5months FEATURES Water Resistant Yes Water Resistant Depth 50m Water Resistant Certificate IP67 Dust Proof Yes Meters and sensors Pedometer Heart Rate Monitor SpO2 (Blood Oxygen) Monitor Calorie Count Step Count Sleep Monitor Extra Features Alarm Clock, Stopwatch, Timer, Reminder