W37 Professional bluetooth and long standby time smart bracelet

• MCU: Nrodic52832 (M4)
• G-SENSOR:3 axis sensor low power
• Optical Sensor: HRS3300
• Main body: L*W*T=44*37*13mm
• Screen: 1.3 TFT IPS colorful display 240*240 resolution
• Material: ABS/PCSUS304
• Strap material: TPU
• Bluetooth: 4.0 BLE
• Battery: 180mAh polymer
• Using time: about 7 days, Standby time: About 20 days
• Charge way: magnetic USB cable
• Communication distance: within 10m
• Upgrade way: OTA
• APP language: multi-language
• Compatible system: Android 5.1 or above, iOS 10.3 or above