510 Battery & USB Charger Kit contents:

• (1) 350mAH Battery
  
• (1) USB Charger
• Three adjustable voltage and preheat: 3.4v, 3.7v, 4.0v

Easy-to-use twist and fit 510 thread end. 

Easily attach to your favorite DD8 vape cartridge. 

Button activation to power the battery on and off, three adjustable voltages and preheat. 

Click the button: 

• 5 times to power on and off.
  
• 3 times to adjust voltage.
  
• 2 times to preheat. 

Long lasting; durable battery. Protection of overcharge, short circuit and overtime. Fast charging.