GBlife Bluetooth 4.0 Smart Bracelet Sport Watch with Sleep Fitness Tracker Calorie (Black) Main Features:Alarm Clock, Avoid phone loss, Call reminder, Calories burned measuring, Date, Distance recording, Incoming calls show, Pedometer, Sedentary reminder, Sleep management, SMS Reminding, Time This device <span class="a-text-bold">Does Not</span> have heart rate monitor function. Bluetooth 4.0 technology: Adopts Bluetooth 4.0 technology that it can quickly and efficiently meet the needs of your life. Sleep monitor / Sedentary reminder / Pedometer: Take care of your health, monitor your sleep, remind you to have a rest and track your sports. Distance measurement: Measure your daily walking distance precisely. Calorie consumption management: Calculate the consumption of calorie, record the daily burned calorie. Call reminder: When a call is coming, you can check it without taking out of your mobile phone. Anti-lost: Take good care of your smart watch and phone. For incoming calls: The watch will vibrate and display caller name or phone number. For text messages: The watch will vibrate, and you can tap to see the first few rows of the message. For notifications from social media: The watch will vibrate but will only display an icon, no text. For customized reminders: You can set up to 6 reminders. The watch will vibrate but will only display an icon, no text. When connecting to the computer, it can only charging rather than sync health data. Standby time: 5 days Case material: Stainless Steel Band material: TPU Alarm group: 10 groups Alert type: Vibration Water resistant level: Daily water-resistant. Compatible OS: Android,IOS Compatibility: Android 4.3, IOS 7.0 and above system Type of battery: Li-polymer Battery Battery Capacity: 55mAh Screen type: OLED Operating mode: Touch Screen Language: English,Chinese Dial size: 3.28 x 3.28 x 1.0 cm / 1.29 x 1.29 x 0.39 inches Band size: 24.0 x 1.7 cm / 9.45 x 0.67 inches Package weight: 0.195 kg Product size (L x W x H): 24.00 x 3.28 x 1.00 cm / 9.45 x 1.29 x 0.39 inches Package size (L x W x H): 25.00 x 4.28 x 2.00 cm / 9.84 x 1.69 x 0.79 inches 1 x Smart Watch 1 x Chinese and English Manual 1 x Charging Cable 1 x Charging Base