This large mosque, which was opened in 2000, was partly inspired by the Blue Mosque in Istanbul. The mosque's website is in Malay only. Statistics on the number of tourist visits are given, so it is clearly possible to visit the mosque outside of prayer times, but the website doesn't seem to make clear what arrangements would be needed, so it might be a good idea to call, especially if you're a non-Muslim interested in seeing the interior outside of prayer times. If you are a Muslim and would like to pray at the mosque, prayer times are prominently displayed on the website.