I use it with an iPhone and there is no problem on this side. Autonomy is correct and takes into at least a day. In terms of sound, SMS notification is perfectly audible against the ringing of calls is much lower and for conversations is even lower. We must stick to the watch ear to hear properly. Unfortunately it is impossible to adjust the volume.
The night lights is done by pressing a button and is really good. It is not waterproof but it is specified in the description.
I did not have notice either in French or in English but in Chinese. So luckily there was information in the description.
