The I.O. Pod from Innokin is a very unique device. The mod is one of the smallest devices available on the market. The kit is powered by a very compact 310mAh battery which is built in. The pod shines when it comes to ease of use, making it perfect for beginner users; however even more demanding users will find this kit adequate when they are looking for a simpler and more portable device. The pod uses a 0.8ml pod which is refillable.