Eleaf Istick 20W Box ModNominal Capacity: 2200mAh Firmware Upgradeable: No Short circuit Protection Function: Yes TCR Adjustment Modes: No Temperature Control: Yes Type: Electric Mod Atomizers Identification Function: Yes Brand Name: Eleaf Overheating Protection Function: Yes Monitoring Function Of Smoking Number: No USB Charger: Yes Display screen: Yes Material: Metal Model Number: Eleaf istick 20W 2200mah Silicone Case: No Built in Or External Battery: Yes Low Voltage