Frame Aluminum alloy frame Strap TPU strap Battery Light usage: 24 days Heavy usage: 7 days Battery Capacity 550mAh Resolution: 432 × 514 pixels, PPI: 324 Display Ultra-large 2.07" Square AMOLED display 60 Hz refresh rate Built-in GNSS: Supported Water resistance rating: 5ATM Bluetooth calling: Supported Local available storage: 512MB