Contact tube fit 510 atomizer (such as: kayfun v4, protank, etc.)
New version billet bridge, Changalbe coils (0.4-3.2ohm)
Easy to adjust engraved voltage dial, left gear up, right gear down
Volt: 2.8-5.5V
Watts: 20W, 30W, 40W
Worked by 2 x 16340 battery (not included)

ype: Electronic Cigarettes Accessories
Accessories type: MOD
Mod: VV/VW Mod
APV Mod Wattage Range: 31-50W
APV Mod Wattage: 40W
Features: Variable Wattage
Material: Metal
 Gold, Black, Silver, Pink, Red, Blue, Purple

Dimension and Weight
Product weight : 0.147 kg
Package weight : 0.31 kg
Product size (L x W x H) : 10.2 x 5.3 x 2 cm / 4.01 x 2.08 x 0.79 inches
Package size (L x W x H) : 15 x 9 x 6 cm / 5.90 x 3.54 x 2.36 inches