Portable Cartridge Base with Universal Micro-USB Charge
UNIVERSAL CHARGE - Built-in micro-USB port for easy, universal, charging anywhere. Use the supplied Micro-USB cable. MULTIPLE SETTINGS - High, Medium, Low - 3.2V (Red) 3.7V (Green) 4.2V (Blue). See Included Instruction Manual For Details. UNIVERSAL FIT - Using 510 Thread, the Volt-Pen Fits Most Attachments On The Market.
