The Allo Sync Device is a pre-filled closed pod system that provides a smooth hit. The device is draw activitated which means there is no need to push any buttons. Simply take a puff and you'll experience the same sensation as taking a draw from a traditional cigarette. The Allo Sync features a 450 mAh battery, mesh coil pods (sold separate), which prevents leaking and spit back. Unlike previous Allo devices, the Allo Sync device is not a disposable unit. It is rechargeable and it has a Type C charger for fast charging. It uses pre-filled Allo Sync Pods that hold 2ml e-liquid capacity.