Lte and utms built-in gps gnss glonass beidou s8 with 64-bit dual-core processor w3 apple wireless chip u1 chip ultra wideband always-on altimeter capacity 32gb blood oxygen sensor third-generation optical heart sensor electrical heart sensor certified ip6x dust resistant high-g accelerometer high-dynamic-range gyroscope ambient light sensor always-on retina ltpo oled display with force touch 1000 nits digital crown with haptic feedback second-generation speaker and mic wi-fi 802.11B g n 2.4Ghz bluetooth 5.0 Built-in rechargeable lithium-ion battery up to 18 hours of battery life water resistant 50 meters swimproof