The Mi Band 4 is the name of Xiaomi‘s next fitness tracker. After more than a month since we saw it get its Bluetooth certification, fresh details have surfaced, and this time they are images of the device. The photos are from Taiwan’s NCC where the Mi Band 4 has been certified.

The 4th-gen Mi Band will have a rectangular screen with thick bezels around it and a piece of curved glass covering it. There is a circular halo capacitive button below the screen that replaces the recessed one from the Mi Band 3. The heart rate sensor makes a comeback but the sensor might be a better one.

Another big change is the position of the charging pins. They have been moved from the side on the Mi Band 3 to the bottom. This means the Mi Band 3’s charging cable won’t work for it. This is the same thing Xiaomi did with the Mi Band 3 as it also doesn’t work with the Mi Band 2’s charging cable.

[envira-gallery id=”250894″]

Thankfully, there is a picture of the new charging cable. The cable is designed like a cradle such that the tracker sits inside to charge. With the design of the Mi Band 4 changed, it will probably not also work with the straps of the Mi Band 3.

READ MORE: Xiaomi launches the DDPAI miniONE Dashcam with improved Night Vision camera

The Mi Band 4 will also come with a bigger battery. One of the images shows the device dismantled and we can see the markings on the battery say it has a capacity of 135mAh.

The Mi Band 4 should launch in May seeing as it is already getting certified in other regions outside China. It will arrive alongside an NFC version.