60mm * 60mm * 7mm
Android, IOS, Windows
A. With charging for just 30 min, the battery life is longer than 5 days of continuous usage. If you turn it on and off, you can use it much longer.
A. Velcro loop sticker and velcro loop strap is in the same package. You can put it wherever you need.
A. You do not need to install the App, however, with the App installed, you can enjoy more useful features like music title text-to-speech, device tracker function, etc.