Specification: Bluetooth version: Bluetooth 4.0 Waterproof Rating : IP54 Colors: Black,Blue,Red Screen: No Compatability: Android 4.3 / iOS 7 and above system Language: English Battery Type: Polymer lithium battery Battery Capacity: 157mAh Voltage: DC 5.0V Standby time: About 120 hours Functions: Measurement of heart rate,Sleep management,Steps counting Alert type: Vibration Shape of the dial: Rectangle Case material: PVC The dial thickness: 1.0 cm / 0.39 inches The dial diameter: 2.0 cm / 0.79 inches The band width: 1.5 cm / 0.59 inches Wearable length: 14.5 - 20.9 cm / 5.71 - 8.23 inches Product weight: 0.021 kg Product size (L x W x H): 24.70 x 2.00 x 1.00 cm / 9.72 x 0.79 x 0.39 inches Package content: Smart Health Watch, USB Charging Dock, English Manual
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