Purple trim on a black body gives this flip case combo a little personality without being loud. Inside is a 1G Timeless battery, ready for a 1-gram Timeless cart. The battery has no buttons. It fires when you draw, and the tip glows to show it's on. The flip case closes over battery and cart together, keeping lint and dust off between sessions. Quick check: to test the battery alone, inhale through the open end with no cart attached. If the light comes on, it's working. Recharge when it blinks.