Product X1 Color Black, Silver Weight 40g (Excluding strap) Dimensions 46.5*46.5*11.8 mm Mechanical Screen Size 1.3" Screen Type TFT-LCD, 3D curved glass Screen Cover Corning Gorilla 3rd Generation Glass Bottom Material Plastic bottom case Strap Material TPU Buckle TPU Tongue Buckle 316L stainless steel powder metallurgy Hardware CPU Nodic nRF52832 Acceleration sensor Support G-sensor Support Motor Support Screen 1.3" TFT-LCD Screen Resolution 240*240 Flash 512KB ROM 64MB Bluetooth BLE4.0, BLE5.0 Power Standby time 45 Days Usage time 10 Days Battery type Lithium polymer battery Battery capacity 260mAh Charging method Socket charging Charging time ? 2 hours Function 8 Languages Support English, German, Spanish, French, Italian, Japanese, Russian and Portuguese Reminder Call and SNS vibration reminder, sedentary reminder,Abnormal heart rate reminder Dial 4 dials, free switching Pedometer Step counting, calorie consumption calculation, exercise mileage record Sleep monitoring Record normal sleep (excluding short break): falling sleep time, wake up time, total sleep time. Heart rate 24-hour real-time heart rate monitoring 9 Sport modes Outdoor running, outdoor walking, indoor running, indoor walking, hiking, climbing, outdoor cycling, indoor cycling, rower 0ther functions Stopwatch; countdown; music control; brightness adjustment; wrist raise wake screen; APP download QR code Notification reminder (IOS \ Android) Twitter, Facebook, Linkedlh, WhatsApp, Line, lnstagram, Snapchat, skype and so on Call and SNS reminder, you can hung it up by watch. Synchronised time