Up to 12 months battery life under power-saving mode LOKMAT MK16 features a and rugged look. It is a practical stylish watch that worth owning. Product Description - Smartphone connected with App via BT 4.0. Stable fast and super low consumption. - Pedometer: set your health goal and view your daily activities check and analyze data anytime. - Simple and clear function menu one button operation easy to use. - LCD displays distance and calories. - 3 groups of buzzer sound alarm you won t miss anything. - Professional stopwatch supports subsection time and background waking. - IP67 ( or 5ATM ) standard dust and water resistant withstands splashes or brief immersion in water. - 12 months standby time under saving mode without the hassle of frequently charging. NOTE: 1) Do not press any button while underwater. 2) Do not take the rear cover apart by yourself. (The rear cover requires professional equipment to disassemble and install.) 1.5ATM Waterproof Suitable for everyday use such as swimming fishing etc. (Not suitable for diving and snorkeling.) 2.24 hours real-time sport monitoring walking walking distance and energy consumption etc data is at your fingertips. 3.Professional Stopwatch You can wear it playing sports which makes your life more joyful. 4.Message Reminder Beeps to remind you of incoming calls and messages. 5.Compatible with Android and iOS Connect your phone to display your activity or use the Sports+ app. Parameters: Chip: SI-BW03 System: EX WATCH 1.0 Screen: FSTN / FullView BT: BT4.0 (distance ＜ 10m with no obstacle) Compatibility: Android 4.0 or later iOS 8.0 or later Water-Resistant Level: IP67 / 5ATM Standby Time: about 5 months(under high consumption); about 8 months(under normal use); 12 months(under power saving mode) In-device App: Sports+ APP Languages: Chinese(tradition) Chinese(simplified) English Russian French Italian German Spanish Portuguese Japanese Polish Turkish. Functions: Alarm Stopwatch Activity ( count / calories burned/ distance) Notification reminder Remote Luminous dial Auto Time display(dateweekhourminutesecond) 1224 hours. Specifications: Model: MK16 Color: Black / Red / Blue / Gold (Optional) Case Material: TPU Band Material: TPU Dial Diameter: 5.5*5.3cm / 2.16*2.08in Dial Thickness: 1.7cm / 0.66in Watchband Width: 2.2cm / 0.86in Watch Length: 28cm / 11.02in Watch Weight: 72g / 2.53oz Package Size: 10*8*6cm / 3.93*3.14*2.36in Package Weight: 143g / 5.04oz Package List: 1 * Watch 1 * User Manual