The smartphone is connected to the app via BT 4.0, which is stable, fast and has very low consumption. The remote camera is within 10m, the function menu is simple and clear, one-button operation, easy to use. The professional stopwatch supports subsection time and background alarm clock, and supports data cloud storage. The LCD screen displays steps, distance and calories. Reminder: 3 groups buzzer sound alarm, call, SMS, Twitter, Facebook, WhatsApp, Skype Pedometer: set your health goals and view your daily activities, check and analyze data at any time. Water resistance: daily water resistance (not used for showering and swimming). Screen: 1.14 inch round screen BT: BT 4.0 Compatibility: with Android 6.0 / iOS 7.0 and above Battery: 290mAh Battery life: (power saving) 12 months Battery life: (normal ) 8 months App languages: English, Russian, French, Italian, German, Spanish, Portuguese, Japanese and Arabic. Functions: exercise data recording, pedometer, calories, mileage (km), remote camera, alarm clock, phone and SMS reminders, etc. Brand: LOKMAT Strap: TPU Case: alloy Mirror table: glass Waterproof level: waterproof Dial diameter: 5.5 cm / 2.17 inch Dial thickness: 2.0 cm / 0.79 inch Strap width: 2, 2 Cm / 0.87 inch Strap length: 26 cm / 10.24 inch Watch weight: 86 grams About data cloud storage: Exercise data can be stored on the watch for 15 days. Upload to cloud server and save it permanently. Access it via mobile phone. Share your exercise data on social networks. Both the app and the background server support global networking. You can share sports data and rankings with friends around the world. Note: Do not press any button in the water. Support daily waterproofing (not suitable for showering and swimming). The APP language has been synchronized with the mobile phone. Do not disassemble the back cover yourself. The back cover requires professional equipment to remove and install. Due to photo light or other reasons, there may be slight differences between the picture and the actual product. Please refer to the actual product. Thank you!