The ET-S BDC is an upgrade version of ET BDC, it has an exterior metal sleeve surrounding the tank with two small windows that allow you to see how much liquid is left in the tank at all times. It holds 3ml of e-liquid and comes compatible with three coils each of which are rated at different ohms.
WARNING: This product contains nicotine, a chemicals known to the state of California to cause birth defects or other reproductive harm. This product has not been approved by the FDA. This product is not a smoking cessation device. This product is not intended to diagnose, treat, prevent, cure, or mitigate any disease or medical condition or offer any therapeutic benefit. DO NOT use this product if you are pregnant, nursing, or at risk of any respiratory conditions, heart disease, high blood pressure, diabetes, or any other medical condition. Consult your doctor before use if you have any medical conditions. STOP using this product immediately if you experience symptoms such as nausea, dizziness, a weak or rapid heartbeat, vomiting, diarrhea, or any negative physical symptom.