Description Dimensions 92 × 32 × 8.2 mm (main unit) Weight 50g (main unit including battery) Battery Type Rechargeable lithium polymer battery Battery Runtime 500 tests per charge (30s mode) Charging Time 2-3 hours Heart Rate Range 30 to 250 BPM ECG Recording Duration 30 seconds/5 minutes Memory 2 minutes * 10 records Compatibility iOS 9.0 or later / Android 5.0 or later Wireless Connection Bluetooth 4.0 BLE Features 1. Portable design, easy to hold, allows for ECG monitoring anytime, anywhere, suitable for home and outdoor use. 2. High-precision sensor, real-time monitoring of heart health, accurate and reliable data. 3. Supports multi-device connectivity, syncing data with smartphones via Bluetooth for long-term health management. 4. Simple operation, one-button start, makes it easy for even the elderly to use, and comes with clear user instructions. Comments: 1. Manual measurement tolerance is 2-5g. Please do not mind any replacements. 2. Due to differences between monitors, the image may not reflect the actual color of the item. Thank you very much! 3. The SKU color is the color of the product packaging. Package Includes: 1 * ECG Monitor