Huawei TalkBand B1 Quick Start Manual page 210

device against any danger caused
by lightning.
Ideal operating temperatures are

0 °C to +35 °C. Ideal storage
temperatures are -10 °C to +45 °C.
Extreme heat or cold may damage
your device or accessories.
Do not expose your device to

direct sunlight (such as on a car
dashboard) for prolonged periods.
Keep the device away from

sources of heat and fire, such as a
heater, microwave oven, stove,
water heater, radiator, or candle.
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