Universal Tips are 3-pin construction which is stronger connected and will not fall out. Provide Stable Power for you!The tips will adjust the right voltage auto matically when connected. Every tip has voltage value and number on it.
We can't return your payment if you buy a single DC head without buying our adapter and you can't use the DC head because of the quality problem of your adapter or the problem of the standard voltage.
3-Pin DC Tip for Universal Laptop Adapter Car Charger Power Connectors