Joytech Teros Pod System All-in-One Starter Kit . The Joytech Teros features a sleek and slim all-in-one pod system designed for vapers on the go or simply looking for an easy to use device. The Teros features unique color changing photochromic (PC) and thermochromic (TC) versions available. The photochromic versions changes color by sunlight and the thermochromic versions changes color by the environment temperature. The Teros utilizes Joyetech ECO technology which provides an ultra efficient low voltage output designed to help preserve battery life. The Teros features a refillable 2.0ml cartridge with a 0.5ohm coil. The Teros features no buttons and is automatically activated when you inhale. The Teros features a built-in 480mAh battery in a lightweight and compact design. The Joye Teros Kit includes (2) refillable empty pod cartridges which may be filled with your favorite e-Liquid of your own choosing. The Teros may be charged via the micro USB port.