Chips: Wearfit Pro App, SF32LB551 Material: Aluminum alloy + IML Waterproop IPX 68; Bluetooth: V5.0+3.0 54.8g is the net weight (watch band included). Display dimensions: 2.02 inches, 320 by 390 pixels 300mAh battery with a 3.7V charging time of 2.5 hours, a 10-day working life, and a 150-day standby