Title: Haylou RS4 Plus,1.78” Retina AMOLED Display,368*448 Pixel,Craft With Metal 105 Sports Mode,100+ Online Watch Faces & Customized Watch Face SpO2 Heart Rates,Sleep And Temperature Monitoring. Description: 1.78”AMOLED display & 60Hz refresh rate,100+ online watch faces(view mode switching),105 sports modes. Magnetic strap,all day heart tracking,spo2 and temperature monitoring,IP68 waterproof. HD retina grade AMOLED display,with 368*448 Pixel unprecedented visual clarity,the large 1.78-inch screen provides you with a precise and clear experience anytime,anywhere. Magnetic strap comfortable to wear,It can be quickly taken apart and is comfortable to wear and take off. 100+Online watch faces to suit your style,more than 100+ stylish watches faces,or even upload your own photo as the background image for true personalization. 100+ sport modes-A trusted fitness partner,haylou RS4 plus has 105 workout modes.it can reccord real-time exercise data,helping you track and improve your athletic performance. Multi UI main menu suit your style,three kinds of UI operations such s cellular model. Smart sleep monitoring-deep sleep recording helper.smart spo2 tracking.smart 24-hour heart rate monitoring. IP68 dustproof and waterproof,10-day battery life noneed recharging during workdays. Feature: Product model:Haylou RS4 Plus Dimensions:45.2*37.2*10.4(mm) Strap width:20mm Weight(with strap):57.6g Display:1.78” AMOLED display Battery capacity：230mAh Water-resistance grade:IP68 Workout modes:105 modes Note: There is a little of difference according to manual measurement. The actual use may be slightly different depending on the specific situation. The product warranty is only for customers in China, foreign customers cannot be guaranteed.