I would recommend the Kicker 46KISLOC2. It was easy to install and it works as stated. The device is smaller and even has a red indicator light to let you know if it's working. The one con is it will not work if you don't ground the black wire. If not grounded, instead of getting 12v, it will only produce 5v. If installed correctly, the Kicker 46KISLOC2 works perfect!