Description: - Clips to your workout apparel or MP3 holder via clip on back of unit. - Audio Interface: 1/8 stereo headphone jacks (TRS connector). - Rechargeable 125mAh lithium polymer battery with a batter life of 10 hours. - Workout Time: 10 Hours. - Charge Time via USB: 3 Hours. - Sensor Communication Link: ANT+™ protocol to - - Heart Rate Monitor and Stride Sensor. - RF Frequency: 2. 4 GHz. - Sensor Communication Range: 2. 5m. - PC Connection: 1/8 TRS to USB series A connection (cord included). - Operating Temp: -15 to +40°C. - Size: 56mm x 41mm x 16. 75mm. - Weight: 22. 9g. ; Heart Rate Monitor: - Provides accurate heart rate data throughout your run. - User-replaceable CR2032 lithium battery with 1000+ hours of active battery life (2. 8 years @ 1 hr/day usage at 20°C). - Communication Link: ANT+ protocol. - Operating Temp: 0 to +40°C. - RF Frequency: 2. 4 GHz. - Communication Range: 2. 5m. - Water Resistance: 1m. - Measuring Range: 15 to 240 BPM. - Monitor Size: 63mm x 38mm x 10. 5mm. - Armband at Longest Length: 34. - Armband at Shortest Length: 24. - Weight: 19. 5g (not including strap). ; Stride Sensor: - Attaches to shoe using one-piece clip or by being placed in the midsole cavity of adidas compatible footwear. - Speed Range: 3. 6 km/h to 19. 8 km/h (2. 2 mph to 12. 3 mph). - User-replaceable CR2032 lithium battery with 5+ months of battery life (at 20°C), extreme cold can affect battery life. - Operating Temp: 0° to +40°C. - Communication Link: ANT+ protocol. - RF Frequency: 2. 4 GHz. - Communication Range: 2. 5m. - Sensor Technology: Dynastream Technology. - Calibrated Speed/Distance Accuracy: Run 97%. - Uncalibrated Speed/Distance Accuracy: Run 95%. - Ref In-Shoe Size: 34mm x 23mm x 8mm. - Total In-Shoe Weight: 8g (including battery). - Ref Size with Shoe Clip: 45mm x 29mm x 13mm. - Total Weight with Clip: 9g (including battery). ; Accessories: USB Cable, earphones, Lithium Battery,MP3 Connector cable, Quick Start Guide Notes: SD.