This product is a 5pk of the replacement heads for the DTS only, the DTS device is not included and these heads will not fit any other tank.  The device can be purchased here:  Cigreat DTS E-Cig Kit

The Cigreat DTS is a truly unique piece. Unlike other e-cigs, the battery on the DTS fits inside of the tank that holds the e-liquid resulting in a very compact and portable design. No more long battery with a long tank attached to the top. Instead you have a 3.5ml tank that houses both the heating coil head and battery, yet still fits in the palm of your hand.