Huawei Honor Band 4 and Band 3 Pro appear with heartrate, color screens - CNET

New Huawei wearables have been registered with the FCC.

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Battle of the bands heats up as leaked Huawei Band 4 Pro render shows off colorful options - News

Huawei Honor Band 4 and Band 3 Pro appear with heartrate, color screens - CNET

Huawei Band 4 and Band 4e Review – Using them together also makes sense - Reviews

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User manual Honor Band 4 Running (English - 32 pages)