This is the dual battery engine starter from Hobby Taiwan. It takes 2 7.2v Ni-Mh batteries (please note both are required for operation) and has a cone to fit a wide variety of aircraft spinners. The starter is also compatible with helicopters if using a starter adaptor (NOT SUPPLIED), and features a dedicated helicopter start button. The starter has a flat base and stands up on it's own, has 2 start buttons (for plane and helicopter) and takes 2 standard Sub C sized 7.2v Ni-Mh batteries with Tamiya connectors. PLEASE NOTE THE STARTER DOES NOT INCLUDE THE BATTERIES OR CHARGER, and does require both batteries to function.PLEASE NOTE BATTERIES SHOWN ARE NOT INCLUDED WITH STARTER UNIT