Lintelek Fitness Tracker with Heart Rate Monitor This tracker requires iOS 7.1 & Android 4.4 above, Wireless 4.0 (Smartphone only, not for PC, iPad or Tablet) Note: IP67 water resistant, you can wear the tracker when running in rains and washing hands, but do not wear it when showering, swimming, or diving. Key Features: OLED 0.96 Inch Screen: View your health data on a bright and clear OLED 0.96 inch screen and customize your clock face that suits your taste. Call Alert: The tracker vibrates and call is displayed on screen when there is an incoming call. Sedentary Alert: Set reminders for periods of time of inactivity. Alarm Alert: Set silent alarms on the tracker to wake you up and not disturb your partner. SNS Alert: Receive notifications from other apps (Facebook, WhatsApp, LinkedIn, Instagram, and Twitter) on your tracker screen. SMS Alert: Enable the function to read incoming text message on your tracker screen. Remote Camera Shooting: Operation on the screen could remotely control photography shooting. Wrist Sense: The screen is automatically lightened up when you turn your wrist towards you. SPECIFICATIONS Model: ID115Plus HR Wireless Version: Wireless 4.0 or later Wireless Transmission Distance: 10 Meters (32.8 feet) CPU: Nordic nRF52832-QFAA Sensor: KIONIX KX022-1020 HR Sensor: silicon labs Si1142 Screen size: 0.96 inch Screen type: OLED Material: upper casing: PC; strap: TPU Dimension: suits for wrist size: 5.4 inch - 7.6 inch Battery type: Li Battery Battery capacity: 65mAh Working time: 5-10 days Charging method: USB charging Charging time: 1-2 hours Weight: 0.84 oz (23.8g)"