1.64″ (456×280) AMOLED color screen, Built-in GPS, BT 5.2, 5ATM, Durable polymer materials, 21 gram (strap excluded)Strap: Silicone, Width: 20 mm, wrist circumference: 130-210 mmBattery:- 9 days of maximum usage- 6 days of typical usage- When AOD is