SpecificationsCPURTL8763EWE(dual system)MemoryRAM 578KB + ROM 640KBScreen Size1.04 inch AMOLED HD full touch screen, Resolution 340*340Phone Call Bluetooth CallTouch Screenfull touch screenConnectorCharging pad, Pogo pin cable CompatabilityAndroid and IOSSleep MonitorYesBlood OxygenYesMenstrual CycleYes, record Pregnancy PeriodWaterproofIP68Battery160mAh, 4.4V, Up to 7 days Daily use time Case materialStainless steel Product size43.3*35.2*11.3MM (without strap)