Specifications:

• Wireless Interface: Bluetooth / ant+
• Weight: 9g/21.5g/67.3g
• Waterproof: IP54
• Two Link Modes: Bluetooth and ANT+ Protocol
• Stopwatch and Accessories: Stopwatch Wire
• Size: 8.85x29.8x38.3mm/0.35x1.17x1.51
• Sensor: Geomagnetic Sensor
• Origin: CN(Origin)
• Model Number: Heart
• Model: Gemini 210 S3+
• Chest Strap Size: 64-86cm/25.2-33.86
• Battery life: 400 hours
• Battery: 2032 Button Battery