Haven't seen this one on the thread yet. Maybe I missed it. In tonight's Gotsmok email. Fastech, so beware of ship times:
Smowell DPV-50 Box Mod $39.80
Recessed 510 threading connection
Floating 510 center pin
Bottom micro-USB charging port
0.66 inch OLED display screen show wattage, voltage, resistant and battery level
Variable wattage: Can be adjustable from 6.0W to 50W (in 0.1W increment)
Operating voltage: 3.7-4.2V
Matches atomizers with 0.2-4.0 Ohms resistance
High voltage warning (higher than 4.5V)
Low voltage warning (lower than 3.0V)
Atomizer resistance check
Over heat protection
Mech Mode and Wattage Mode switchable
House single 18650 battery (battery sold separately)
http://www.fasttech.com/products/2139600