If you’re a fan of those ohm meters that also fire your coils then this GeekVape 521 Tab may be right up your alley. This is a sleek looking device that has a 510 connection right in the middle. To the right of that is a switch to choose between fire, ohm reader, and off. On the left is the fire button. Set the switch to ohm reader and it will give you the resistance of your currently attached device. Set it to fire and it will fire your currently attached device. This is great for tidying up your coils and checking the resistance all on the same device. It’s powered by a single 18650 battery.

Details:

Size: 93.6mm*75.4mm*24.7mm
Resistance Measuring Range: 0.01 – 9.9Ω
Lowest resistance rate: 0.1Ω
Connection : 510 elastic poles
Battery: Lithium 18650, 3.7V (Batteries are not included in the product)
OFF – Turn off
Fire (switch button) – Burning mode, press the left button ‘Fire’ to get burning resistance
Ohm Reader – Resistance measuring mode
Reverse battery protection
Low-voltage protection
Short circuit protection
Breaker protection
Low resistance
High temperature protection