Huawei Honor Band 4 and Band 3 Pro appear with heartrate, color screens - CNET
Huawei Band 4 Review - YouTube
Amazon.com: HUAWEI Band 4 Pro - Smart Band Fitness Tracker with 0.95 Inch AMOLED Touchscreen, 24/7 Heart Rate Monitor, Indoor Outdoor Pro Tracking, Sleep Monitor, Built-in GPS, 5ATM Waterproof - Graphite Black
HUAWEI Band 4 Smart Band, Fitness Activities Tracker with 0.96" Color Screen | eBay
HUAWEI Band 4 Pro, Graphite Black, AMOLED, 12 Day Battery Life, 5 ATM, GPS, Heartrate Monitor (Canada Warranty) - Newegg.com
Huawei Honor Band 4 NFC
User manual Huawei Band 4 Pro (English - 35 pages)
Amazon.com: HUAWEI Band 3e Smart Fitness Activity Tracker, Dual Wrist & Footwear Mode, 5ATM Water Resistance for Swim, Professional Running Guidance, Black, One Size : Sports & Outdoors