Waterproof Cycling Computer With Chest Heart Rate Monitor Cadence Sensor Wireless Bicycle Speedometer Bluetooth Bike OdometerStopwatch and Accessories: Wireless Stopwatch Model Number: B SD 583 Brand Name: INBIKE Name: Wireless bike computer Backlight Function: Data is clearly visible day and night. Functions: 29+ functions Language: 8 languages Languages: German, French, Dutch, Swedish, Spanish, Italian, English, Chinese Size: 77mm*54mm*12mm 3. 03*2. 12*0. 47'' Weight: 250g Features: Wireless Bluetooth code table Features 4: Multi language setting Features 2: With Chest