Is for schraeder valve only or it can be used with presta (for bicycle use)?
No, it can not be used with Presta directly but you can use the valve adaptor(in the package) with Presta
What temperature is good for gauge to work?
Temperature suitability: Must work successfully for ambient temperature of 23-122 ℉
What kind of battery does this use and is it easily replaceable?
It uses one CR2032 battery and three AG13 batteries. Two small Philips head screws and it is open. The trigger button might fall off but it is simple to put back in place.