The Barb Fire is hands down one of the most powerful essential oil vaporizers around. The Clapton Coil is the key. It has a twisted flat ribbon kanthal coil which is neatly housed in a ceramic base chamber. The Clapton coil has 0.2-0.3mAh sub-ohm resistance and has approximately a 5 second heat time. The mouthpiece is easily removable for coil access. The Atmos Greedy Coils are conveniently compatible with the Barb Fire. The mouthpiece features a splash guard and an adjustable airflow control valve. The Barb Fire uses a standard micro USB cable to charge its 1100mAh battery. The battery provides ample power for its large coil and plenty of vape sessions between charging.