The SD Key Ring E-cig. Trog's latest design that offers maximum punch in a highly portable size. The SD Key Ring E-cig sets new standards in performance and portability. The SD Key Ring E-cig has 3x the run time of comparable products! The SD Key Ring is a long awaited device! It is one of the smallest e-cigs on the market and out performs standard Stick style e-cigs. The battery has 3x the run time! What you get: 2X CML Flavor 510 Cartomizers 1.8%/18mg Nicotine 1X USB SD KEY RING CHARGER 1X SD KEY RING E-CIG BATTERY We have tested this unit with LR Cartomizers and they work awesome! These are an automatic switch unit so drippers beware. Yes a J Tank looks silly on it but it works awesome! And for the price snag a couple of these awesome little units! Check out the pictures below!