1.2.1 inch HD Full Touch Round Screen,Resolution up to 485 * 520px,The picture is clear. 2.NFC access control identification, which only requires the equipment to be close to, wake up and identify in . Easy to open, more efficient 3.Heart rate monitoring,Blood oxygen monitoring,Sleep monitoring,Blood pressure, sedentary reminders, water intake reminders, syphilis, respiratory training. 4.Custom screen page,And dozens of page options,There is always one 5.GPS motion trajectory synchronization. You can turn on map navigation on your watch Multiple functions for outdoor activities:Compass mode for directional recognition, altitude monitoring, and air pressure monitoring! There is also an emergency SOS function! the safety of outdoor activities! Experience a different adventure! The watch comes with 96 sports modes! Display : 485 * 520 pixels Bluetooth Version: Bluetooth 5.1 : support Android 5.0 system and IOS 9.0 above Charging Method : Magnetic suction wireless charging fast charging (150MA/hour) Silicone strap: 22mm width, total length 256mm, adjustable range 175-260mm Memory:RAM:(192KB) / ROM:128M Watch Size : Diameter 43.5MM/Thickness 14MM Watch Weight (With silicone strap) :200g Battery :330mAh High Density Lithium-ion Battery APP Name: RDFit watch case Colour:black Material:Silica gel Package Contents: 1 x Watch 1 x Charging cable 2 x Strap Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.