Reuleaux RX200- Customized TCR(Temperature Coefficient of Resistance)Mode - Newly Added TC-SS316 Mode - Optional TC-Ni/TC-Ti/VW Mode - Stainless Steel Thread & Spring Connector - Three Replaceable Cells & Magnetic Back Cover Upgradeable firmware:You can upgrade your firmware through the micro USB port. Moreover, the upgradeable firmware will make you keep up ...