The Willo-perfect unity of aesthetic and technology!

Product Description: 

• 510 Thread
• 650mAh Large Battery Capacity
• Smart Circuit board with Overheat Protection

Usage Instructions: 

• THREE (3) Working Voltage Options: 3.4V, 3.7V, 4.0V
• Click the button 3x to change the voltage. You will see a corresponding light flash 3 times when the voltage is changing
• Click 5x to power device on or off. 

Charging instructions: 

• Charges through Micro-USB
• Please note: *Charging cable is included.