Huawei Band 4eDIMENSIONSBody: 40.5 mm x 14.8 mm x 11.2 mm (H x W x D)Wrist strap: 210 mm x 15 mm (H x W)WEIGHT.Band body + Strap: Approximately 13 gBand body: Approximately 6 g*Product size, product weight, and related specifications are theoretical values only. Actual measurements between individual products may vary. All specifications are subject to the actual product.DISPLAYPMOLED black-and-white screenResolution: 48 x 88 pixelDimensions: 0.5 inches (11.244 mm x 6.124 mm in AA zone)MICROPROCESSOR32-bit ARM Cortex-M41 MB FlashAES 128-bit encryption ARM Cortex-M4SENSORS6-axis motion sensorBATTERYCapacity: 77 mAhType: unremovable lithium batteryCharging time: less than 120 min (at temperature about 25 °C)Battery life:Theoretical battery life: 14 days (according to the Huawei lab model)Theoretical standby time: 21 days*Typical value. Actual capacity may vary slightly.This capacity is the nominal battery capacity. The actual battery capacity for each individual phone may be slightly above or below the nominal battery capacity.ENVIRONMENTOperating temperature: -10 °C to + 45 °CEXTERNAL PORTAdopts the pogo pins charging solution, and a USB-to-pogopin charging cradle is provided.BUTTONOne capacitance home buttonWATERPROOF LEVEL5 ATMBLUETOOTHBluetooth frequency: 2.4 GHzBluetooth 4.2Maximum Bluetooth connection distance: 10 m (in an open area)MATERIALBody：Front cover: PC + ABS / PC + PCRear cover: ABS / PCWrist strap: PET (Recycled Yarn)Shoe buckle: PC + PA + GFNote:1. All the preceding materials have passed the chemical and allergy tests conducted by professional institutions (or biological component test), and the materials are all safe for skin.2. To prevent colors from fading, do not let the wrist strap soak in water too long, and avoid leaving it in the sun. You can hand-wash your wrist strap with soap and warm water and place the strap somewhere out of the sun to dry.