Huawei Band 4 and Band 4e Review – Using them together also makes sense - NotebookCheck.net Reviews
Huawei Band 4 fitness tracker launched in India for ₹1,999 ($28) - Gizmochina
HUAWEI Band 4 Smart Band, Fitness Activities Tracker with 0.96" Color Screen, 24/7 Continuous Heart Rate Monitor, Sleep Tracking, 5ATM Waterproof, up to 6 Days of Usage Time, Sakura Pink : Amazon.co.uk: