Amazfit bip s smart watch

in good condition, charge holds 20 days, without box Main OS: Amazfit OS Compatibility: Android 5.0+ / iOS 10.0+ Sensors PPG Huami-PAI GPS GLONASS heart rate sensor Case Weight: 31 g. Water resistance: 5 ATM Composition: polycarbonate Feature: 316L stainless steel Strap Length: 85-110 mm Width: 20 mm Material: silicone + leather Screen Touch: Yes! Technology: Transflective TFT Resolution: 176x176 Size: 1.28 inch Autonomy Capacity: 200 mAh Working time: 40 days