Multi-functional cycling computer will track cycling data like t/maximum/average speed,trip distance, ce,heart rate, temperature etc.Heart rate mode with t heart rate indicator,which can monitor our heart rate during cycling to ensue our safety. 2.5'' LCD large screen provide clear and crisp reading, enjoy your pleasant cycling trip! Functions: 2 Bike System t/Maximum/Average Speed Trip Distance Auto Trip Timer Service Reminder for Bike 1&2 Speed Comparator Speed Tendency Odometer Save Function for Bike 1&2 Total Distance for Bike 1+Bike 2 t/Maximum/Average ce t/Maximum/Minimum Heart Rate Heart Rate Zone Alert Calories Counter Fat Burnt Digital Cwith 12/24 Format KM/M Selection Temperature with C/F Selection Auto Start/Stop Auto -up Auto Power Off EL Backlight Specifications: Color: White/Black (optional) Material: ABS Waterproof: IP65 Power source: 3* 210mAh CR2032 battery (included) Computer dimension: 75*50mm/3*2in Package weight: Approx. 202.3g/7.1oz Package List: 1* Bicycle Computer 1* Heart Rate Sensor 1* Speed and ce Sensor 1* Chest Strap 1* Bracket 1* Speed and ce Magnetic Screw 8* Cable Ties 3* CR2032 Batteries 1* Instruction