Can I use it without pairing to a phone?

Yes, the Ember Mug and Ember Mug² will be fully functional without a mobile device. In this case, it will maintain a default temperature of 57 degrees Celsius. Once hot liquids are added, the Ember will pulse white as it works to reach the set temperature. This light will turn solid white when the preferred temperature has been reached. Using the Ember without the App will limit you from the following features:

• Changing the temperature between 120°F to 145°F (if the app is not in use, the default temperature is 135°F)
• Customizing your LED color identifier
• Assigning presets to different drinks
• Updating your Ember Mug
• Viewing battery life
• Changing brightness of the LED light
• Using the Tea timer