This compact Ohm Reader from Coil Master is a must-have device for advanced DIY vapers. Designed to accurately test-fire and read coil resistances for more accurate coil building. No more worrying about doing complex math every time you build a new coil, simply attach your build deck to the 521 Mini Tab Ohm Reader and you'll get an accurate resistance measurement displayed on the high-definition OLED screen. A perfect device for both DIY starters and advanced vapers alike. 
 
Features and Specifications:
Dimension : 3-1/8" x 3-1/8" x 1-1/8"
Weight : 80g
Housing material: ABS
Ohm-Meter
Battery Output Voltage Testing
Coil Rebuilding Deck
Coil Firing
Reverse Battery Protection
Short Circuit Protection
Resistance Measuring Range: 0.01 – 9.99 ohm
Voltage Measuring Range: 0.3 – 9.99 Volt
Resistance Rate: As low to 0.1 ohm
Connection : 510 Threaded with Spring Loaded Contact Pin
Powered by a single 18650 High Amp Battery (Not Included)
 
Package Includes:
1x Coil Master 521 Mini Tab
User Manual 
 
Mechanical and rebuild-able devices are for advanced users only—not for beginners or intermediate users. Understand Ohm's Law and how to use a multi-meter or ohmmeter to check for the resistance or for shorts in their coil builds before utilizing these devices. These materials cannot be safely used by those without basic knowledge of how these devices function. Please ensure proper precautions are taken when using these devices so as to not cause damage and/or harm to the battery, mechanical mod, atomizer, yourself or others. Vapourizen will not be held liable or responsible for any damages caused by misuse or mishandling of these vaping products and devices. Use at your own risk.