Heart Rate Black Smart Watch Sports Bracelet

New, box has been opened

• CPU: HS6620D
• HR Sensor: HX3300
• Display: 1.3" LCD Screen
• Memory: 1MB ROM + RAM Expand SPI 4MB
• Data Transmission: BLE4.0
• Strap Material: Silicone
• Battery: 200mAh Li-Polymer
• Charging Time: About 2 Hours
• Data Storage: Yes