Genuine OEM high quality water tight sealed CDI unit with a 6 pin plug, will not only help starting but will also produce smooth power delivery, with a good racing ignition advance curve.
Do not confuse this item with similar cheap Chinese copies that last only a short while until final failure.
It will work with kick or electric start engines and has an AC input so will work without a battery as well as with one.
Easy to install with no instruction required (plug & play).
Please check images against your current part for compatibility, typically used for bikes between 50cc and 160cc.