The Stick V8 Baby Starter Kit by Smok is a simple and effective kit.
The device fires at a fixed voltage, and the only adjustable feature is the airflow on the tank. This tank is definitely a direct to lung (DTL) sub ohm tank. This device has a 2000 mAh battery, which generally lasts close to a day with normal use. The device has a range of protections such as 8 seconds protection, low resistance protection, short circuit protection, and low voltage protection.
The Baby Beast that this kit comes with is an awesome tank, and is compatible with almost every mod on the market. This means if you decide to upgrade your mod, the tank can almost certainly be used.