While it looks more or less the same with the predecessor, the Mi Band 4 packs a 0.95-inch AMOLED colour touchscreen display and it's actually nearly 40% bigger. The screen has a brightness of 400 nits and it is protected by a 2.5D tempered glass.
The device has been released in three models, the Mi Band 4, an NFC variant and Mi Band 4 Avengers Series Limited Edition. The Band 4 has 39.9% more display area due to the use of a two-layer capacitive touch panel, unlike the previous generation.
As for customisation, there are five colour (adjustable) straps to choose from, and 77 themes.
You can also expect all the sports ready software for your fitness activities.
It is also certified to work underwater upto 5ATM or 50 meters where it can gauge your swimming speed and stroke rate to provide a comprehensive analysis. This is meant to detect the different activities while the wearer is on the move and it is also capable of calculating the fitness parameters. It is possible that the company fine-tunes this functionality for Indian users to work with Google Assistant or Amazon Alexa when it launches here. The standard Mi Band 4 has come with a 135mAh battery and it is rated to last up to 20 days on a single charge.
Mi Smart Band 4 has already launched in Beijing, Italy, Spain, and France, with an unconfirmed United Kingdom date to follow. The limited edition set comes with additional bands and it is priced at 329CNY (about RM199). Mi Band 4 Avengers edition will go on sale for CNY349 (~Rs 3,500).
The standard, as well as the NFC versions of the Xiaomi Mi Band 4, has gone up for pre-order on Giztop.